{"id":227,"date":"2026-10-07T15:47:09","date_gmt":"2026-10-07T13:47:09","guid":{"rendered":"https:\/\/datenquelle.at\/?page_id=227"},"modified":"2026-10-08T04:42:44","modified_gmt":"2026-10-08T02:42:44","slug":"api-login-failed-401-or-403","status":"publish","type":"page","link":"https:\/\/en.datenquelle.at\/index.php\/api-login-failed-401-or-403\/","title":{"rendered":"API login failed: 401 or 403"},"content":{"rendered":"<div class=\"et_pb_section_0 et_pb_section et_section_regular et_flex_section\">\n<div class=\"et_pb_row_0 et_pb_row et_flex_row\">\n<div class=\"et_pb_column_0 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_code_0 et_pb_code et_pb_module\"><div class=\"et_pb_code_inner\"><section class=\"dq-section dq-help-hero\" id=\"dq-main\"><div class=\"dq-wrap\"><nav class=\"dq-breadcrumbs\" aria-label=\"Breadcrumb navigation\"><a href=\"https:\/\/en.datenquelle.at\/\">Home<\/a><span>\/<\/span><a href=\"https:\/\/en.datenquelle.at\/index.php\/errors-solutions-for-your-data\/\">Errors & solutions<\/a><span>\/<\/span><a href=\"https:\/\/en.datenquelle.at\/index.php\/errors-solutions-for-your-data\/#api\">Interfaces & APIs<\/a><\/nav><p class=\"dq-eyebrow\"><span class=\"dq-dot\" aria-hidden=\"true\"><\/span>Interfaces & APIs<\/p><h1>API authentication failed: 401 or 403?<\/h1><p class=\"dq-lead\">HTTP 401 indicates missing or rejected authentication. HTTP 403 means the request is refused, often because the required permissions are missing. The API documentation and response text show which rules the specific interface uses.<\/p><ol class=\"dq-help-flow\" aria-label=\"Data path and checkpoint\"><li><span>Source<\/span><strong>Integration application<\/strong><\/li><li class=\"is-checkpoint\"><span>Check the connection<\/span><strong>Identity & Permissions<\/strong><\/li><li><span>Destination<\/span><strong>API resource<\/strong><\/li><\/ol><\/div><\/section><\/div><\/div>\n<\/div>\n<\/div>\n<\/div><div class=\"et_pb_section_1 et_pb_section et_section_regular et_flex_section\">\n<div class=\"et_pb_row_1 et_pb_row et_flex_row\">\n<div class=\"et_pb_column_1 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_code_1 et_pb_code et_pb_module\"><div class=\"et_pb_code_inner\"><section class=\"dq-section dq-help-body\"><div class=\"dq-wrap\"><div class=\"dq-help-layout\"><article class=\"dq-help-article\"><section class=\"dq-help-situation\"><h2>How this appears in daily operation<\/h2><p>A scheduled synchronization worked yesterday. Today it receives only 401 or 403. An administrator can still log in through the interface. These are different access methods: a working browser account does not confirm access for the integration application.<\/p><\/section><section id=\"ursachen\"><h2>Distinguish typical causes<\/h2><div class=\"dq-help-causes\"><div><h3>Access no longer valid<\/h3><p>A token may have expired, been replaced or been revoked. The interface determines whether a renewal mechanism is available.<\/p><\/div><div><h3>Missing access to the resource<\/h3><p>Authentication may be valid while the account, role or approved scope does not match the requested function.<\/p><\/div><div><h3>Different environment or request<\/h3><p>Test and production systems may use separate accounts and addresses. A changed request may also access a different area.<\/p><\/div><\/div><\/section><section id=\"pruefen\"><h2>What you can check first<\/h2><ol class=\"dq-help-checks\"><li><h3>Record status and response text separately<\/h3><p>Record the time, resource and any request ID. Remove secrets from headers or URLs.<\/p><\/li><li><h3>Review the last change with those responsible<\/h3><p>Was a key rotated, a role changed or the application moved to another environment?<\/p><\/li><li><h3>Review documentation and approvals<\/h3><p>Check the expected authentication method and required permissions. Do not repeat production write requests as a connection test.<\/p><\/li><\/ol><\/section><section id=\"tiefer\"><h2>When the problem runs deeper<\/h2><p>Repeated authentication problems may indicate unclear responsibilities or a missing renewal process. We therefore examine not just the current key, but also the planned data flow and its feedback. The goal is traceable access with appropriate permissions.<\/p><div class=\"dq-help-details\"><details><summary>Distinguish authentication from authorization<\/summary><p>First, we clarify which identity the application uses. Then we determine whether it may perform the desired function. A new token with the same unsuitable permissions may not fix the error.<\/p><\/details><details><summary>Make process failures visible<\/summary><p>A failed retrieval must not be processed as an empty dataset. We clarify when a run stops, when a retry makes sense and who receives understandable feedback. These rules follow your process.<\/p><\/details><\/div><\/section><section id=\"weiter\"><h2>When support makes sense<\/h2><p>If synchronization is operationally important or multiple systems are involved, clear access and process planning is worthwhile. The API name, status code and an anonymized description are enough for the first discussion. API keys are not needed.<\/p><a class=\"dq-help-service\" href=\"https:\/\/en.datenquelle.at\/index.php\/connect-systems\/\"><span>The right solution path<\/span><strong>Connect interfaces with clearly defined access<\/strong><span class=\"dq-ui-arrow\" aria-hidden=\"true\"><\/span><\/a><aside class=\"dq-help-cross\"><p>DataSource provides further technical depth for OAuth, permission models and complex API integration.<\/p><a href=\"https:\/\/datasource.at\/\" rel=\"noopener\">Further technical depth from DataSource<span class=\"dq-ui-external\" aria-hidden=\"true\"><\/span><\/a><\/aside><\/section><section class=\"dq-help-sources\"><h2>Sources for technical assessment<\/h2><ul><li><a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/HTTP\/Reference\/Status\/401\" rel=\"noopener\">MDN: HTTP 401 Unauthorized<\/a><\/li><li><a href=\"https:\/\/developer.mozilla.org\/en-US\/docs\/Web\/HTTP\/Reference\/Status\/403\" rel=\"noopener\">MDN: HTTP 403 Forbidden<\/a><\/li><\/ul><p>Technical content reviewed on 7 October 2026. Vendor statements refer to the products named; they do not replace checking your specific configuration.<\/p><\/section><\/article><aside class=\"dq-help-toc\"><nav aria-label=\"On this help page\"><span class=\"dq-kicker\">On this page<\/span><a href=\"#ursachen\">Typical causes<\/a><a href=\"#pruefen\">Initial checks<\/a><a href=\"#tiefer\">Technical relationships<\/a><a href=\"#weiter\">Suitable solution path<\/a><\/nav><div><span class=\"dq-kicker\">Related problems<\/span><a href=\"https:\/\/en.datenquelle.at\/index.php\/unknown-or-undocumented-interface\/\">Unknown or undocumented interface<\/a><a href=\"https:\/\/en.datenquelle.at\/index.php\/online-store-shows-incorrect-stock-levels\/\">Online store shows incorrect stock levels<\/a><a href=\"https:\/\/en.datenquelle.at\/index.php\/errors-solutions-for-your-data\/\">To the topic overview<\/a><\/div><\/aside><\/div><\/div><\/section><\/div><\/div>\n<\/div>\n<\/div>\n<\/div><div class=\"et_pb_section_2 et_pb_section et_section_regular et_flex_section\">\n<div class=\"et_pb_row_2 et_pb_row et_flex_row\">\n<div class=\"et_pb_column_2 et_pb_column et-last-child et_flex_column et_pb_css_mix_blend_mode_passthrough et_flex_column_24_24 et_flex_column_24_24_tablet et_flex_column_24_24_phone\">\n<div class=\"et_pb_code_2 et_pb_code et_pb_module\"><div class=\"et_pb_code_inner\"><section class=\"dq-section dq-help-contact-section\"><div class=\"dq-wrap\"><div class=\"dq-help-contact\"><div><h2>Clarify the next step together.<\/h2><p>Your application names and a brief description of the problem are enough to start.<\/p><\/div><a class=\"dq-button\" href=\"https:\/\/en.datenquelle.at\/index.php\/discuss-your-data-challenge\/\" aria-haspopup=\"dialog\" aria-controls=\"dq-booking-modal\" data-dq-booking>Book an initial consultation<\/a><\/div><\/div><\/section><\/div><\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Distinguish API errors 401 and 403: check valid authentication, permissions and environment. Protect credentials and narrow down the affected process.<\/p>\n","protected":false},"author":2,"featured_media":204,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-227","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/en.datenquelle.at\/index.php\/wp-json\/wp\/v2\/pages\/227","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/en.datenquelle.at\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/en.datenquelle.at\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/en.datenquelle.at\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/en.datenquelle.at\/index.php\/wp-json\/wp\/v2\/comments?post=227"}],"version-history":[{"count":4,"href":"https:\/\/en.datenquelle.at\/index.php\/wp-json\/wp\/v2\/pages\/227\/revisions"}],"predecessor-version":[{"id":307,"href":"https:\/\/en.datenquelle.at\/index.php\/wp-json\/wp\/v2\/pages\/227\/revisions\/307"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/en.datenquelle.at\/index.php\/wp-json\/wp\/v2\/media\/204"}],"wp:attachment":[{"href":"https:\/\/en.datenquelle.at\/index.php\/wp-json\/wp\/v2\/media?parent=227"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}