diff --git a/swh/web/assets/src/bundles/browse/origin-search.js b/swh/web/assets/src/bundles/browse/origin-search.js
index aaa3036c..6c7df1b3 100644
--- a/swh/web/assets/src/bundles/browse/origin-search.js
+++ b/swh/web/assets/src/bundles/browse/origin-search.js
@@ -1,223 +1,223 @@
 /**
  * Copyright (C) 2018  The Software Heritage developers
  * See the AUTHORS file at the top-level directory of this distribution
  * License: GNU Affero General Public License version 3, or any later version
  * See top-level LICENSE file for more information
  */
 
 import {heapsPermute} from 'utils/heaps-permute';
 import {handleFetchError} from 'utils/functions';
 
 let originPatterns;
 let perPage = 20;
 let limit = perPage * 10;
 let offset = 0;
 let currentData = null;
 let inSearch = false;
 
 function fixTableRowsStyle() {
   setTimeout(() => {
     $('#origin-search-results tbody tr').removeAttr('style');
   });
 }
 
 function clearOriginSearchResultsTable() {
   $('#origin-search-results tbody tr').remove();
 }
 
 function populateOriginSearchResultsTable(data, offset) {
   let localOffset = offset % limit;
   if (data.length > 0) {
     $('#swh-origin-search-results').show();
     $('#swh-no-result').hide();
     clearOriginSearchResultsTable();
     let table = $('#origin-search-results tbody');
     for (let i = localOffset; i < localOffset + perPage && i < data.length; ++i) {
       let elem = data[i];
       let tableRow = '<tr>';
       tableRow += '<td style="width: 120px;">' + elem.type + '</td>';
       let browseUrl = Urls.browse_origin(elem.url);
       tableRow += '<td style="white-space: nowrap;"><a href="' + browseUrl + '">' + browseUrl + '</a></td>';
       tableRow += '<td id="visit-status-origin-' + elem.id + '"><i title="Checking visit status" class="fa fa-refresh fa-spin"></i></td>';
       tableRow += '</tr>';
       table.append(tableRow);
       // get async latest visit snapshot and update visit status icon
       let latestSnapshotUrl = Urls.browse_origin_latest_snapshot(elem.id);
       fetch(latestSnapshotUrl)
         .then(response => response.json())
         .then(data => {
           let originId = elem.id;
           $('#visit-status-origin-' + originId).children().remove();
           if (data) {
             $('#visit-status-origin-' + originId).append('<i title="Origin has at least one full visit by Software Heritage" class="fa fa-check"></i>');
           } else {
             $('#visit-status-origin-' + originId).append('<i title="Origin has not yet been visited by Software Heritage or does not have at least one full visit" class="fa fa-times"></i>');
           }
         });
     }
     fixTableRowsStyle();
   } else {
     $('#swh-origin-search-results').hide();
     $('#swh-no-result').text('No origins matching the search criteria were found.');
     $('#swh-no-result').show();
   }
   if (data.length - localOffset < perPage ||
       (data.length < limit && (localOffset + perPage) === data.length)) {
     $('#origins-next-results-button').addClass('disabled');
   } else {
     $('#origins-next-results-button').removeClass('disabled');
   }
   if (offset > 0) {
     $('#origins-prev-results-button').removeClass('disabled');
   } else {
     $('#origins-prev-results-button').addClass('disabled');
   }
   inSearch = false;
   if (typeof Storage !== 'undefined') {
     sessionStorage.setItem('last-swh-origin-search-offset', offset);
   }
   setTimeout(() => {
     window.scrollTo(0, 0);
   });
 }
 
 function escapeStringRegexp(str) {
   let matchOperatorsRe = /[|\\{}()[\]^$+*?.]/g;
   return str.replace(matchOperatorsRe, '\\\\\\$&');
 }
 
 function searchOrigins(patterns, limit, searchOffset, offset) {
   originPatterns = patterns;
   let patternsArray = patterns.trim().replace(/\s+/g, ' ').split(' ');
   for (let i = 0; i < patternsArray.length; ++i) {
     patternsArray[i] = escapeStringRegexp(patternsArray[i]);
   }
   let patternsPermut = [];
   heapsPermute(patternsArray, p => patternsPermut.push(p.join('.*')));
   let regex = patternsPermut.join('|');
   let withVisit = $('#swh-search-origins-with-visit').prop('checked');
   let searchUrl = Urls.browse_origin_search(regex) + `?limit=${limit}&offset=${searchOffset}&regexp=true&with_visit=${withVisit}`;
 
   clearOriginSearchResultsTable();
   $('.swh-loading').addClass('show');
   fetch(searchUrl)
     .then(handleFetchError)
     .then(response => response.json())
     .then(data => {
       currentData = data;
       if (typeof Storage !== 'undefined') {
         sessionStorage.setItem('last-swh-origin-url-patterns', patterns);
         sessionStorage.setItem('last-swh-origin-search-results', JSON.stringify(data));
         sessionStorage.setItem('last-swh-origin-search-offset', offset);
       }
       $('.swh-loading').removeClass('show');
       populateOriginSearchResultsTable(data, offset);
     })
     .catch(response => {
       $('.swh-loading').removeClass('show');
       inSearch = false;
       $('#swh-origin-search-results').hide();
       response.text().then(errorDescription => {
         $('#swh-no-result').text(`Error ${response.status}: ${response.statusText}.\n${errorDescription}`);
         $('#swh-no-result').show();
       });
     });
 }
 
 export function initOriginSearch() {
   $(document).ready(() => {
     if (typeof Storage !== 'undefined') {
       originPatterns = sessionStorage.getItem('last-swh-origin-url-patterns');
       let data = sessionStorage.getItem('last-swh-origin-search-results');
       offset = sessionStorage.getItem('last-swh-origin-search-offset');
       if (data) {
         $('#origins-url-patterns').val(originPatterns);
         offset = parseInt(offset);
         currentData = JSON.parse(data);
         populateOriginSearchResultsTable(currentData, offset);
       }
       let withVisit = sessionStorage.getItem('last-swh-origin-with-visit');
       if (withVisit !== null) {
         $('#swh-search-origins-with-visit').prop('checked', JSON.parse(withVisit));
       }
     }
 
-    $('#search_origins').submit(event => {
+    $('#swh-search-origins').submit(event => {
       event.preventDefault();
       $('#swh-no-result').hide();
       let patterns = $('#origins-url-patterns').val();
       offset = 0;
       inSearch = true;
       // first try to resolve a swh persistent identifier
       let resolvePidUrl = Urls.resolve_swh_pid(patterns);
       fetch(resolvePidUrl)
         .then(handleFetchError)
         .then(response => response.json())
         .then(data => {
           // pid has been successfully resolved,
           // so redirect to browse page
           window.location = data.browse_url;
         })
         .catch(response => {
           // pid resolving failed
           if (patterns.startsWith('swh:')) {
             // display a useful error message if the input
             // looks like a swh pid
             response.json().then(data => {
               $('#swh-origin-search-results').hide();
               $('.swh-search-pagination').hide();
               $('#swh-no-result').text(data.reason);
               $('#swh-no-result').show();
             });
           } else {
             // otherwise, proceed with origins search
             $('#swh-origin-search-results').show();
             $('.swh-search-pagination').show();
             searchOrigins(patterns, limit, offset, offset);
           }
         });
     });
 
     $('#origins-next-results-button').click(event => {
       if ($('#origins-next-results-button').hasClass('disabled') || inSearch) {
         return;
       }
       inSearch = true;
       offset += perPage;
       if (!currentData || (offset >= limit && offset % limit === 0)) {
         searchOrigins(originPatterns, limit, offset, offset);
       } else {
         populateOriginSearchResultsTable(currentData, offset);
       }
       event.preventDefault();
     });
 
     $('#origins-prev-results-button').click(event => {
       if ($('#origins-prev-results-button').hasClass('disabled') || inSearch) {
         return;
       }
       inSearch = true;
       offset -= perPage;
       if (!currentData || (offset > 0 && (offset + perPage) % limit === 0)) {
         searchOrigins(originPatterns, limit, (offset + perPage) - limit, offset);
       } else {
         populateOriginSearchResultsTable(currentData, offset);
       }
       event.preventDefault();
     });
 
     $(document).on('shown.bs.tab', 'a[data-toggle="tab"]', e => {
       if (e.currentTarget.text.trim() === 'Search') {
         fixTableRowsStyle();
       }
     });
 
     $(window).on('unload', () => {
       if (typeof Storage !== 'undefined') {
         sessionStorage.setItem('last-swh-origin-with-visit',
           JSON.stringify($('#swh-search-origins-with-visit').prop('checked')));
       }
     });
 
   });
 }
diff --git a/swh/web/templates/browse/branches.html b/swh/web/templates/browse/branches.html
index 3b590228..ccc4782e 100644
--- a/swh/web/templates/browse/branches.html
+++ b/swh/web/templates/browse/branches.html
@@ -1,58 +1,58 @@
 {% extends "./browse.html" %}
 
 {% comment %}
 Copyright (C) 2017-2018  The Software Heritage developers
 See the AUTHORS file at the top-level directory of this distribution
 License: GNU Affero General Public License version 3, or any later version
 See top-level LICENSE file for more information
 {% endcomment %}
 
 {% block swh-browse-content %}
 <div class="card-header bg-gray-light">
   <div class="float-left">
     <h4>{{ swh_object_name }}</h4>
   </div>
   <div class="clearfix"></div>
 </div>
 
 <div class="table-responsive">
   <table class="table swh-table-even-odd">
     <thead>
       <tr>
         <th><i class="fa fa-code-fork fa-fw"></i>Name</th>
         <th>Revision</th>
         <th>Message</th>
         <th>Date</th>
       </tr>
     </thead>
     <tbody>
       {% for branch in displayed_branches %}
         <tr class="swh-origin-branch">
           <td style="max-width: 300px"><i class="fa fa-code-fork fa-fw"></i><a href="{{ branch.directory_url }}">{{ branch.name }}</a></td>
           <td><a href="{{ branch.revision_url }}">{{ branch.revision|slice:":7" }}</a></td>
           <td class="swh-log-entry-message swh-table-cell-text-overflow" style="min-width: 500px" title="{{ branch.message }}">{{ branch.message }}</td>
-          <td style="min-width: 250px">{{ branch.date }}</td
+          <td style="min-width: 250px">{{ branch.date }}</td>
         </tr>
       {% endfor %}
     </tbody>
   </table>
 </div>
 {% endblock %}
 
 {% block swh-browse-after-content %}
 {% if prev_branches_url or next_branches_url %}
   <ul class="pagination justify-content-center">
     {% if prev_branches_url %}
       <li class="page-item"><a class="page-link" href="{{ prev_branches_url }}">Previous</a></li>
     {% else %}
       <li class="page-item disabled"><a class="page-link">Previous</a></li>
     {% endif %}
 
     {% if next_branches_url %}
       <li class="page-item"><a class="page-link" href="{{ next_branches_url }}">Next</a></li>
     {% else %}
       <li class="page-item disabled"><a class="page-link">Next</a></li>
     {% endif %}
   </ul>
 {% endif %}
 {% endblock %}
diff --git a/swh/web/templates/browse/origin-save.html b/swh/web/templates/browse/origin-save.html
index 37065320..574a86f2 100644
--- a/swh/web/templates/browse/origin-save.html
+++ b/swh/web/templates/browse/origin-save.html
@@ -1,109 +1,109 @@
 {% extends "./layout.html" %}
 
 {% comment %}
 Copyright (C) 2018  The Software Heritage developers
 See the AUTHORS file at the top-level directory of this distribution
 License: GNU Affero General Public License version 3, or any later version
 See top-level LICENSE file for more information
 {% endcomment %}
 
 {% block header %}
 {{ block.super }}
-<script src='https://www.google.com/recaptcha/api.js'></script>
+<script src="https://www.google.com/recaptcha/api.js"></script>
 {% endblock %}
 
 {% block navbar-content %}
 <h4>Save code now</h4>
 {% endblock %}
 
 {% block browse-content %}
 
 <ul class="nav nav-tabs" style="padding-left: 5px;">
   <li class="nav-item"><a class="nav-link active" data-toggle="tab" id="swh-origin-save-request-create-tab" href="#swh-origin-save-requests-create">Create save request</a></li>
   <li class="nav-item"><a class="nav-link" data-toggle="tab" id="swh-origin-save-requests-list-tab" href="#swh-origin-save-requests-list">Browse save requests</a></li>
 </ul>
 
 <div class="tab-content">
   <div id="swh-origin-save-requests-create" class="tab-pane active">
     <p class="mt-3">
       You can contribute to extend the content of the Software Heritage archive by submitting an origin
       save request. To do so, fill the required info in the form below:
     </p>
     <ul>
       <li><b>Origin type:</b> the type of version control system the software origin is using.<br/>
         Currently, the only supported type is <code>git</code>, for origins using <a href="https://git-scm.com/">Git</a>.<br/>
         Soon, the following origin types will also be available to save into the archive:
         <ul>
           <li><code>hg</code>, for origins using <a href="https://www.mercurial-scm.org/">Mercurial</a></li>
           <li><code>svn</code>, for origins using <a href="https://subversion.apache.org/">Subversion</a></li>
         </ul>
       </li>
       <li><b>Origin url:</b> the url of the remote repository for the software origin.</li>
     </ul>
     <p>
       Once submitted, your save request can either be:
     </p>
     <ul>
       <li><b>accepted:</b> a visit to the provided origin will then be scheduled by Software Heritage in order to
         load its content into the archive as soon as possible</li>
       <li><b>rejected:</b> the provided origin url is blacklisted and no visit will be scheduled</li>
       <li>put in <b>pending</b> state: a manual review will then be performed in order to determine if the
         origin can be safely loaded or not into the archive</li>
     </ul>
     <p>
       Once a save request has been accepted, you can follow its current status in the
       <a id="swh-show-origin-save-requests-list" href="#swh-origin-save-requests-list">submitted save requests list</a>.
     </p>
     <form id="swh-save-origin-form" class="needs-validation" novalidate>
       {% csrf_token %}
       <div class="form-row">
         <div class="col-md-1"></div>
         <div class="form-group col-md-2">
           <label for="swh-input-origin-type">Origin type</label>
           <select id="swh-input-origin-type" class="form-control" required>
             {% comment %} <option selected value="">Choose...</option> {% endcomment %}
           </select>
           <div class="invalid-feedback">The origin type must be specified</div>
         </div>
         <div class="form-group col-md-6">
           <label for="swh-input-origin-url">Origin url</label>
           <input type="text" class="form-control" id="swh-input-origin-url" oninput="swh.browse.validateSaveOriginUrl(this)" required>
           <div class="invalid-feedback">The origin url is not valid or does not reference a code repository</div>
         </div>
         <div class="col-md-2"></div>
       </div>
       <div class="form-row">
         <div class="col-md-2"></div>
         <div class="form-group col-md-4">
           <div class="g-recaptcha" id="save-origin-recaptcha" data-sitekey="{{ grecaptcha_site_key }}"></div>
         </div>
         <div class="form-group col-md-1">
           <label for="swh-input-origin-save-submit">&#8203;</label>
           <button type="submit" id="swh-input-origin-save-submit" class="btn btn-default btn-block">Submit</button>
         </div>
       </div>
     </form>
     <p id="swh-origin-save-request-status">
     </p>
   </div>
 
   <div id="swh-origin-save-requests-list" class="tab-pane mt-3">
     <table id="swh-origin-save-requests" class="table table-striped swh-table" width="100%">
       <thead>
         <tr>
           <th>Request date</th>
           <th>Origin type</th>
           <th>Origin url</th>
           <th>Request status</th>
           <th>Save task status</th>
         </tr>
       </thead>
     </table>
   </div>
 </div>
 
 <script>
   swh.browse.initOriginSave();
 </script>
 
 {% endblock %}
\ No newline at end of file
diff --git a/swh/web/templates/browse/search.html b/swh/web/templates/browse/search.html
index bfd1653e..fd4627c1 100644
--- a/swh/web/templates/browse/search.html
+++ b/swh/web/templates/browse/search.html
@@ -1,66 +1,66 @@
 {% extends "./layout.html" %}
 
 {% comment %}
 Copyright (C) 2017-2018  The Software Heritage developers
 See the AUTHORS file at the top-level directory of this distribution
 License: GNU Affero General Public License version 3, or any later version
 See top-level LICENSE file for more information
 {% endcomment %}
 
 {% load static %}
 
 {% block navbar-content %}
 <h4>Search archived software</h4>
 {% endblock %}
 
 {% block browse-content %}
 
-<form class="form-horizontal" id="search_origins">
+<form class="form-horizontal" id="swh-search-origins">
   <div class="input-group">
     <input class="form-control" placeholder="Enter a persistent id to resolve or string pattern(s) to search for in origin urls" type="text" id="origins-url-patterns"/>
     <div class="input-group-append">
       <button class="btn btn-default" type="submit"><i class="swh-search-icon fa fa-search"></i></button>
     </div>
   </div>
   <div class="form-check swh-id-option">
     <input class="form-check-input" value="option-origins-with-visit" type="checkbox"
           id="swh-search-origins-with-visit">
     <label class="form-check-label" for="swh-search-origins-with-visit">only show origins visited at least once</label>
   </div>
 </form>
 <hr class="swh-faded-line">
 <div id="swh-origin-search-results" style="display: none;">
   <div class="table-responsive">
     <table class="table swh-table-even-odd" id="origin-search-results">
       <thead>
         <tr>
           <th>Origin type</th>
           <th>Origin browse url</th>
           <th>Visit status</th>
         </tr>
       </thead>
       <tbody>
       </tbody>
     </table>
   </div>
 </div>
 <div class="swh-loading">
   <img src="{% static 'img/swh-spinner.gif' %}"></img>
   <p>Searching origins ...</p>
 </div>
 <p id="swh-no-result" style="display: none; white-space: pre;">
   <br/>
   No origins matching the search criteria were found.
 </p>
 
 
 <ul class="pagination justify-content-center swh-search-pagination">
   <li class="disabled page-item" id="origins-prev-results-button"><a class="page-link" tabindex="-1">Previous</a></li>
   <li class="disabled page-item" id="origins-next-results-button"><a class="page-link" tabindex="-1">Next</a></li>
 </ul>
 
 <script>
   swh.webapp.initPage('search');
   swh.browse.initOriginSearch();
 </script>
 {% endblock %}
diff --git a/swh/web/templates/includes/apidoc-header.html b/swh/web/templates/includes/apidoc-header.html
index c45644ef..60028c27 100644
--- a/swh/web/templates/includes/apidoc-header.html
+++ b/swh/web/templates/includes/apidoc-header.html
@@ -1,187 +1,187 @@
 {% comment %}
 Copyright (C) 2015-2018  The Software Heritage developers
 See the AUTHORS file at the top-level directory of this distribution
 License: GNU Affero General Public License version 3, or any later version
 See top-level LICENSE file for more information
 {% endcomment %}
 
 <ul class="list-inline">
   <li class="list-inline-item">
     <a href="#endpoint-index">Endpoint index</a>
   </li>
   <li class="list-inline-item">
     <a href="#data-model">Data model</a>
   </li>
   <li class="list-inline-item">
     <a href="#version">Version</a>
-  </li class="list-inline-item">
+  </li>
   <li class="list-inline-item">
     <a href="#schema">Schema</a>
   </li>
   <li class="list-inline-item">
     <a href="#parameters">Parameters</a>
   </li>
   <li class="list-inline-item">
     <a href="#errors">Errors</a>
   </li>
   <li class="list-inline-item">
     <a href="#pagination">Pagination</a>
   </li>
   <li class="list-inline-item">
     <a href="#rate-limiting">Rate limiting</a>
   </li>
 </ul>
 <h4 id="endpoint-index">Endpoint index</h4>
 <p>You can jump directly to the
   <strong>
     <a href="/api/1/">endpoint index</a>
   </strong>, which lists all available API functionalities, or read on for more general information about the API.</p>
 <h4 id="data-model">Data model</h4>
 <p>The
   <a href="https://www.softwareheritage.org/">Software Heritage</a> project harvests publicly available source code by tracking software distribution channels such as
   version control systems, tarball releases, and distribution packages.</p>
 <p>All retrieved source code and related metadata are stored in the Software Heritage archive, that is conceptually a
   <a href="https://en.wikipedia.org/wiki/Merkle_tree">Merkle DAG</a>. All nodes in the graph are content-addressable, i.e., their node identifiers are computed by hashing their
   content and, transitively, that of all nodes reachable from them; and no node or edge is ever removed from the graph: the
   Software Heritage archive is an append-only data structure.</p>
 <p>The following types of objects (i.e., graph nodes) can be found in the Software Heritage archive
   <small>(for more information see the
     <a href="https://wiki.softwareheritage.org/index.php?title=Glossary">Software Heritage glossary</a>)</small>:</p>
 <ul>
   <li>
     <strong>Content</strong>: a specific version of a file stored in the archive, identified by its cryptographic hashes (currently:
     SHA1, Git-like &quot;salted&quot; SHA1, SHA256). Note that content objects are nameless; their names are context-dependent
     and stored as part of directory entries (see below).
     <br />
     <em>Also known as:</em> &quot;blob&quot;</li>
   <li>
     <strong>Directory</strong>: a list of directory entries, where each entry can point to content objects (&quot;file entries&quot;),
     revisions (&quot;revision entries&quot;), or transitively to other directories (&quot;directory entries&quot;). All entries
     are associated to the local name of the entry (i.e., a relative path without any path separator) and permission metadata
     (e.g., chmod value or equivalent).</li>
   <li>
     <strong>Revision</strong>: a point in time snapshot of the content of a directory, together with associated development metadata
     (e.g., author, timestamp, log message, etc).
     <br />
     <em>Also known as:</em> &quot;commit&quot;.</li>
   <li>
     <strong>Release</strong>: a revision that has been marked as noteworthy with a specific name (e.g., a version number), together
     with associated development metadata (e.g., author, timestamp, etc).
     <br />
     <em>Also known as:</em> &quot;tag&quot;</li>
   <li>
     <strong>Origin</strong>: an Internet-based location from which a coherent set of objects (contents, revisions, releases, etc.)
     archived by Software Heritage has been obtained. Origins are currently identified by URLs.</li>
   <li>
     <strong>Visit</strong>: the passage of Software Heritage on a given origin, to retrieve all source code and metadata available
     there at the time. A visit object stores the state of all visible branches (if any) available at the origin at visit
     time; each of them points to a revision object in the archive. Future visits of the same origin will create new visit
     objects, without removing previous ones.</li>
   <li>
     <strong>Person</strong>: an entity referenced by a revision as either the author or the committer of the corresponding change.
     A person is associated to a full name and/or an email address.</li>
 </ul>
 <h4 id="version">Version</h4>
 <p>The current version of the API is
   <strong>v1</strong>.</p>
 <p>
   <strong>Warning:</strong> this version of the API is not to be considered stable yet. Non-backward compatible changes might happen
   even without changing the API version number.</p>
 <h4 id="schema">Schema</h4>
 <p>API access is over HTTPS.</p>
 <p>All API endpoints are rooted at
   <a href="https://archive.softwareheritage.org/api/1/" class="uri">https://archive.softwareheritage.org/api/1/</a>.</p>
 <p>Data is sent and received as JSON by default.</p>
 <p>Example:</p>
 <ul>
   <li>
     <p>from the command line:</p>
     <pre><code class="shell">curl -i https://archive.softwareheritage.org/api/1/stat/counters/</code></pre>
   </li>
 </ul>
 <h4 id="response-format-override">Response format override</h4>
 <p>The response format can be overridden using the
   <code>Accept</code> request header. In particular,
   <code>Accept: text/html</code> (that web browsers send by default) requests HTML pretty-printing, whereas
   <code>Accept: application/yaml</code> requests YAML-encoded responses.</p>
 <p>Example:</p>
 <ul>
   <li>
     <a href="/api/1/stat/counters/" class="uri">/api/1/stat/counters/</a>
   </li>
   <li>
     <p>from the command line:</p>
     <pre><code class="shell">curl -i -H &#39;Accept: application/yaml&#39; https://archive.softwareheritage.org/api/1/stat/counters/</code></pre>
   </li>
 </ul>
 <h4 id="parameters">Parameters</h4>
 <p>Some API endpoints can be tweaked by passing optional parameters. For GET requests, optional parameters can be passed as
   an HTTP query string.</p>
 <p>The optional parameter
   <code>fields</code> is accepted by all endpoints that return dictionaries and can be used to restrict the list of fields returned
   by the API, in case you are not interested in all of them. By default, all available fields are returned.</p>
 <p>Example:</p>
 <ul>
   <li>
     <a href="/api/1/stat/counters/?fields=content,directory,revision" class="uri">/api/1/stat/counters/?fields=content,directory,revision</a>
   </li>
   <li>
     <p>from the command line:</p>
     <pre><code class="shell">curl https://archive.softwareheritage.org/api/1/stat/counters/?fields=content,directory,revision</code></pre>
   </li>
 </ul>
 <h4 id="errors">Errors</h4>
 <p>While API endpoints will return different kinds of errors depending on their own semantics, some error patterns are common
   across all endpoints.</p>
 <p>Sending malformed data, including syntactically incorrect object identifiers, will result in a
   <code>400 Bad Request</code> HTTP response. Example:</p>
 <ul>
   <li>
     <a href="/api/1/content/deadbeef/" class="uri">/api/1/content/deadbeef/</a> (client error: &quot;deadbeef&quot; is too short to be a syntactically valid object identifier)</li>
   <li>
     <p>from the command line:</p>
     <pre><code class="shell">curl -i https://archive.softwareheritage.org/api/1/content/deadbeef/</code></pre>
   </li>
 </ul>
 <p>Requesting non existent resources will result in a
   <code>404 Not Found</code> HTTP response. Example:</p>
 <ul>
   <li>
     <a href="/api/1/content/0123456789abcdef0123456789abcdef01234567/" class="uri">/api/1/content/0123456789abcdef0123456789abcdef01234567/</a> (error: no object with that identifier is available [yet?])</li>
   <li>
     <p>from the command line:</p>
     <pre><code class="shell">curl -i https://archive.softwareheritage.org/api/1/content/04740277a81c5be6c16f6c9da488ca073b770d7f/</code></pre>
   </li>
 </ul>
 <p>Unavailability of the underlying storage backend will result in a
   <code>503 Service Unavailable</code> HTTP response.</p>
 <h4 id="pagination">Pagination</h4>
 <p>Requests that might potentially return many items will be paginated.</p>
 <p>Page size is set to a default (usually: 10 items), but might be overridden with the
   <code>per_page</code> query parameter up to a maximum (usually: 50 items). Example:</p>
 <pre><code class="shell">curl https://archive.softwareheritage.org/api/1/origin/1/visits/?per_page=2</code></pre>
 <p>To navigate through paginated results, a
   <code>Link</code> HTTP response header is available to link the current result page to the next one. Example:</p>
 <pre><code class="shell">curl -i https://archive.softwareheritage.org/api/1/origin/1/visits/?per_page=2 | grep ^Link:
 Link: &lt;/api/1/origin/1/visits/?last_visit=2&amp;per_page=2&gt;; rel=&quot;next&quot;,</code></pre>
 <h4 id="rate-limiting">Rate limiting</h4>
 <p>Due to limited resource availability on the back end side, API usage is currently rate limited. Furthermore, as API usage
   is currently entirely anonymous (i.e., without any authentication), API &quot;users&quot; are currently identified by their
   origin IP address.</p>
 <p>Three HTTP response fields will inform you about the current state of limits that apply to your current rate limiting bucket:</p>
 <ul>
   <li>
     <code>X-RateLimit-Limit</code>: maximum number of permitted requests per hour</li>
   <li>
     <code>X-RateLimit-Remaining</code>: number of permitted requests remaining before the next reset</li>
   <li>
     <code>X-RateLimit-Reset</code>: the time (expressed in
     <a href="https://en.wikipedia.org/wiki/Unix_time">Unix time</a> seconds) at which the current rate limiting will expire, resetting to a fresh
     <code>X-RateLimit-Limit</code>
   </li>
 </ul>
 <p>Example:</p>
 <pre><code class="shell">curl -i https://archive.softwareheritage.org/api/1/stat/counters/ | grep ^X-RateLimit
 X-RateLimit-Limit: 60
 X-RateLimit-Remaining: 54
 X-RateLimit-Reset: 1485794532</code></pre>
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