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feat(auth0-api-js): getClientCredentialsToken (M2M) - #289
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Add ApiClient.getClientCredentialsToken returning TokenSet {accessToken, expiresAt(seconds)}.
Plumb optional scope through getTokenByClientCredentials in auth0-auth-js.
Caching deferred to SDK-11299 (clean seam, no tokenStore param).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
…g [SDK-11361] Add 13 tests: api-client TC-01..09 (TokenSet shape, epoch-seconds expiresAt, audience fallback/override, scope variants incl empty-string, MissingClientAuthError guard, TokenByClientCredentialsError propagation, no token_fingerprint); auth-client TC-A1..A4 (scope append on both grant branches incl fullResponse + empty string). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Add Client Credentials (Machine-to-Machine) section to README and EXAMPLES covering confidential-client setup, audience/scope override, epoch-seconds expiresAt, and MissingClientAuthError. CHANGELOG entry deferred to release branch (version-guard hook restricts CHANGELOG to release/*). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
…-export TokenByClientCredentialsError Back-port of the verified hardening from the integration branch. - SR-11: getClientCredentialsToken now surfaces the authorization-server granted `scope` and `tokenType` on the returned TokenSet instead of silently dropping them, so callers can detect a downscoped grant. Fields are omitted when Auth0 omits them (RFC 6749 §5.1: absent scope means the full requested scope was granted). - SR-6: re-export TokenByClientCredentialsError from the package index so consumers can catch it by type. Adds tests for scope/tokenType surfacing, downscoped grant, and the absent-scope case. vitest 286, tsup, eslint, tsc all green. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Check name Status Explanation Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled. Title check ✅ Passed The title clearly identifies the new getClientCredentialsTokenfeature for machine-to-machine authentication.Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request. Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
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Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 1 functions across 7 files. (2 skipped: 2 unsupported.)
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Inline comments:
Review comments at @packages/auth0-api-js/EXAMPLES.md:
- Around line 157-160: Update the TokenSet documentation for
getClientCredentialsToken() to describe optional scope and tokenType fields;
note that scope may be omitted when it matches the requested scope and that
tokenType contains the returned token type.
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packages/auth0-api-js/EXAMPLES.mdpackages/auth0-api-js/README.mdpackages/auth0-api-js/src/api-client.spec.tspackages/auth0-api-js/src/api-client.tspackages/auth0-api-js/src/index.tspackages/auth0-api-js/src/types.tspackages/auth0-auth-js/src/auth-client.spec.tspackages/auth0-auth-js/src/auth-client.tspackages/auth0-auth-js/src/types.ts
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…t [SDK-11361] Extend api-client.spec.ts with two additional end-to-end scenarios for getClientCredentialsToken that were not covered by the initial test pass: - TC-13: verifies MissingClientAuthError is thrown when a clientId is configured without any client authentication method (clientSecret or assertion key), exercising the auth-layer guard distinct from the no-clientId case covered by TC-07. - TC-14: captures the form-encoded POST body and asserts that client_id and client_secret are forwarded verbatim to the token endpoint, confirming credential plumbing through ApiClient -> AuthClient -> oauth4webapi end-to-end. Test count: 286 -> 288 (api-client.spec.ts: 79 -> 81). Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
nandan-bhat
reviewed
Oct 8, 2026
6 tasks
…grant Consolidate TokenSet into a single declaration. It now lives in token-store.ts, which is also where the token store work will extend it, and types.ts no longer carries a second copy. index.ts exports it exactly once, so an explicit export can no longer shadow the star export from types.ts and silently drop the scope and tokenType fields from the public type. Move the auth0-auth-js scope plumbing out of this branch and onto its own branch. No published version of @auth0/auth0-auth-js forwards a scope on the client credentials grant, and this package accepted ^1.3.0, so every resolvable version dropped the option and the caller received a token for the client's full grant. Raise the floor to ^1.18.0, the first release that will carry the forwarding, rather than leaving the option best effort. This branch therefore does not install until that release is published, which is deliberate and is why the two changes are ordered this way. Correct the documented response behaviour. Auth0 returns scope whenever scopes were requested or granted, so an absent scope is not a statement that the full request was honoured, and the previous wording invited callers to read it that way. Document that tokenType arrives lower-cased by the underlying OAuth client and assert that value exactly instead of hiding it behind toLowerCase(). Replace five tests that could not fail or that tested the wrong layer. Two asserted a snake_case key against a camelCase result, so they always passed, and they now assert the exact key set of the returned object. Three asserted the scope form field on the wire, which this branch no longer changes, and they now assert the options handed to the auth client, which is this package's own responsibility. Remove the internal tracker identifiers that were reaching the published typings, along with the note promising a token cache in this method. Caching tokens from this grant is deferred and is not part of this change. Co-Authored-By: Claude <noreply@anthropic.com>
… request Capture the form-encoded body at the HTTP boundary for a set scope, an omitted scope and an empty string scope, so the tests fail if a dependency drops the parameter. Co-Authored-By: Claude <noreply@anthropic.com>
…dentials result An absent scope means the scopes were granted as requested (RFC 6749 section 5.1). An empty string means nothing was granted. Align the TokenSet comments with the on-behalf-of token cache branch. Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Claude <noreply@anthropic.com>
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What
A machine-to-machine token getter for
@auth0/auth0-api-js, so service-to-service tool code can obtain a client-credentials access token for a downstream API.Contract
audiencedefaults to the configured API audience.MissingClientAuthError.TokenByClientCredentialsError.TokenSetof{ accessToken, expiresAt, scope?, tokenType? }. The authorization-server grantedscopeandtokenTypeare surfaced when the server returns them, so a caller can detect a downscoped grant; they are omitted otherwise.expiresAtis epoch seconds.Acceptance
TokenSetfor both the default and an explicit audiencescopeandtokenTypeare surfaced when returned, omitted when absentMissingClientAuthErrorTokenByClientCredentialsErrorexpiresAtis epoch secondsDelivery
Independent PR against
main.TokenSetis also declared by the OBO token-store PR. Whichever of the two merges second should keep a singleTokenSetdeclaration (the token-store copy, which carriesscopeandtokenType) and drop the duplicate.Summary by CodeRabbit