{
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    "abstract": "This specification provides a framework for the use of assertions with OAuth 2.0 in the form of a new client authentication mechanism and a new authorization grant type. Mechanisms are specified for transporting assertions during interactions with a token endpoint; general processing rules are also specified. The intent of this specification is to provide a common framework for OAuth 2.0 to interwork with other identity systems using assertions and to provide alternative client authentication mechanisms. Note that this specification only defines abstract message flows and processing rules. In order to be implementable, companion specifications are necessary to provide the corresponding concrete instantiations.",
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    "authors": [
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        "name": "Brian Campbell"
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      {
        "name": "Chuck Mortimore"
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      {
        "name": "Michael B. Jones"
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      {
        "name": "Yaron Y. Goland"
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    "docNumber": "7521",
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      "confidence": "high",
      "note": "Parsed from RFC info page report metadata",
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    "docTitle": "Assertion Framework for OAuth 2.0 Client Authentication and Authorization Grants",
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      "confidence": "high",
      "note": "Parsed from RFC index XML title",
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    "doi": "10.17487/RFC7521",
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      "confidence": "high",
      "note": "Parsed from RFC index XML doi",
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      "updated": "2026-10-16T20:46:37.536Z",
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    "href": "https://doi.org/10.17487/RFC7521",
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      "confidence": "high",
      "note": "Derived from DOI (https://doi.org/<doi>)",
      "originalValue": null,
      "source": "resolved",
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      "updated": "2026-10-16T20:46:37.536Z",
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      "JWT"
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      "confidence": "high",
      "note": "Parsed from RFC index XML keywords",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc7521/",
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    "pages$meta": {
      "confidence": "high",
      "note": "Parsed from RFC index XML page-count",
      "originalValue": null,
      "source": "parsed",
      "sourceUrl": "https://www.rfc-editor.org/info/rfc7521/",
      "updated": "2026-10-16T20:46:37.536Z",
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    "publicationDate": "2015-05-01",
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      "confidence": "high",
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      "source": "parsed",
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        "confidence": "medium",
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        "RFC3986",
        "RFC6749"
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        "confidence": "high",
        "note": "Parsed from RFC HTML normative references sections",
        "originalValue": [],
        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc7521/",
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      "source": "resolved",
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      "updated": "2026-10-16T20:46:37.536Z",
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        "confidence": "high",
        "note": "Derived from supersession relationship fields",
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        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc7521/",
        "updated": "2026-10-16T20:46:37.536Z",
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        "confidence": "high",
        "note": "Derived from presence of errata links on RFC/Datatracker pages",
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        "source": "parsed",
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        "updated": "2026-10-16T20:46:37.536Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
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      "latestVersion": true,
      "latestVersion$meta": {
        "confidence": "high",
        "note": "Derived from supersession relationship fields",
        "originalValue": null,
        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc7521/",
        "updated": "2026-10-16T20:46:37.536Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
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      "statusNote": "Proposed Standard",
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        "source": "parsed",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc7521/",
        "updated": "2026-10-16T20:46:37.536Z",
        "version": "extractDocs.js@commit:2c3b1db1b97b"
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        "confidence": "high",
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        "source": "resolved",
        "sourceUrl": "https://www.rfc-editor.org/info/rfc7521/",
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