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Skill

credential-recipe-research

research custom authentication recipe fields

Published by n8n Updated Aug 9
Covers Research n8n Auth API Development

Description

Lookup procedure for Simplified Custom Auth recipe fields — sources the auth template, the key-issuing docsUrl and an auth-rejecting testUrl from the provider's real documentation instead of memory. Load before composing credentialHints for a service without a dedicated credential type (the post-build-flow setup step), or when asked to fix a recipe whose template, key page or test endpoint is wrong.

SKILL.md

Credential Recipe Research

A recipe is only as good as the documentation it came from. This is a procedure, not guidance: execute every step with the research tool and keep only findings you can point to on a fetched page. Guessed URLs are how users end up on the wrong page with a key that can't be verified.

Inputs: the service name and the API host(s) the workflow's nodes call.

1. Auth scheme (template)

Fetch the provider's authentication docs — research(action="web-search") with "<service> API authentication", then fetch-url the best docs hit. Record the scheme EXACTLY as documented: header name, prefix word, casing (Authorization: Key {{api_key}} vs Bearer {{api_key}} vs a custom header like xi-api-key). If the documented auth is basic, digest, or OAuth, stop: that is not expressible as a template — use the matching generic type instead (see the workflow-builder skill's credential ladder).

2. Key page (docsUrl)

Find where a logged-in user CREATES or COPIES the key. The URL is not shown in the form — the AI Assistant help thread presents it as THE place to get the value, so a wrong URL sends the user to a dead end with full confidence:

  • Search "<service> dashboard API keys", and scan the fetched auth docs for phrases like "get your key from", "Dashboard → API Keys", "console", "settings".
  • The answer normally lives on an app/console/dashboard host — console.apify.com/settings/integrations, elevenlabs.io/app/settings/api-keys, replicate.com/account/api-tokens, app.tavily.com/home — not under /docs, /reference, or /documentation.
  • Accept a docs-domain URL only when the fetched page shows keys are actually issued there (some ReadMe-style logged-in portals do).
  • NEVER construct a dashboard path by analogy (/account/api-keys, /dashboard/keys, …). Dashboards are apps behind a login: a fetch answers 200 for any invented route, so the path cannot be verified by fetching. Emit a deep dashboard URL only when it appears VERBATIM on a page you fetched; when the docs only describe navigation ("Dashboard → API Keys") without a literal URL, use the dashboard/app root they reference — a shallower real page beats a deeper invented one.
  • Nothing conclusive after both steps → omit docsUrl. Never pass off the API reference as the key page.

3. Verification endpoint (testUrl)

Find a documented, side-effect-free GET that rejects a bad key with 401/403. Check the API reference in this order and stop at the first qualifying hit:

  1. Account/profile/me endpoints — /v1/account, /v2/users/me, /v1/user.
  2. Usage/quota endpoints — e.g. fal's /v1/models/usage, Tavily's /usage.
  3. List/discovery endpoints — /v1/templates, /v1/models, /v1/voices.

Rules, all mandatory:

  • The endpoint must appear on a page you fetched — never construct a path by analogy with other APIs.
  • Never one of the workflow's own endpoints, never a resource or action URL, never anything that can trigger billable work. Setup rejects workflow-URL collisions, and the probe reports unexpected statuses as "could not be verified" — an invented URL only costs the user trust.
  • Skip endpoints that answer 2xx regardless of the key: auth-optional endpoints (Pexels search) or services that signal auth errors in the response body (Apollo's auth/health, TikTok) — a status probe cannot verify through them.
  • Nothing qualifies → omit testUrl. The credential saves fine and the card honestly reports it could not be verified, which beats a false green.

4. Compose

Fill credentialHints (field list and example in the post-build-flow skill) from the findings above only. suggestedName names the service ("Apify API Token"); never include a real secret.

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