generated: '2026-08-31'
method: searched
source: https://reefapi.com/playground + https://reefapi.com/docs + https://reefapi.com/pricing + live MCP probe 2026-08-31
docs: https://reefapi.com/playground
name: ReefAPI
slug: reefapi
summary: >-
  ReefAPI has no test-vs-live key split and no fixture data. Its trial model is
  different and, for this product class, better suited - a browser playground that runs
  REAL calls with no setup, a 1,000-credit no-card free grant, keyless MCP discovery,
  and a billing rule that makes failure free. There is no sandbox to drift out of sync
  with production because there is no sandbox: you test against live data.
modes:
  test_mode: false
  live_mode: true
  key_prefixes:
    live: ak_live_
    test: null
  note: >-
    Only one key prefix is published (ak_live_). No ak_test_ / sk_test_ equivalent
    appears in the docs, llms.txt or llms-full.txt.
surfaces:
- name: Playground
  type: hosted-console
  url: https://reefapi.com/playground
  http_status: 200
  auth_required: false
  detail: >-
    "Try any endpoint in the browser without code" - an in-browser console covering all
    183 engines, reachable with no setup and no account per the docs and llms.txt.
- name: Free credit grant
  type: trial-quota
  url: https://reefapi.com/signup
  http_status: 200
  amount: 1000 credits
  card_required: false
  expiry: none
  detail: Credits never expire, so an evaluation can be paused and resumed.
- name: Keyless MCP discovery
  type: anonymous-introspection
  url: https://api.reefapi.com/mcp
  auth_required: false
  verified: probed 2026-08-31
  detail: >-
    initialize, tools/list, prompts/list and resources/list all return 200 with no
    Authorization header, and four of the five tools (search_engines, get_catalog,
    get_engine_schema, get_action_schema) are documented and verified keyless. An agent
    can explore the entire 183-engine surface, read every action's parameter contract
    and its credit price, and build a correct call - all before a key exists.
- name: Per-action example payloads
  type: fixtures
  url: https://reefapi.com/docs/{engine}.md
  detail: >-
    Every action publishes a ready-to-run example request body in its markdown doc and
    in the MCP get_action_schema response (field `example_params`). Verified on
    amazon.md - each endpoint carries an "Example request body" JSON block.
failure_is_free:
  documented: true
  detail: >-
    "You're charged only on a successful response - failed or blocked calls (anything
    where ok is false) cost nothing." Published on the docs, the pricing page, llms.txt
    and the MCP repo README. This is the practical substitute for a sandbox - a wrong
    call during development costs zero.
test_values:
  published: false
  note: >-
    No magic test identifiers, test ASINs, test addresses or simulator values are
    published. The docs' example bodies use REAL live identifiers (e.g. amazon
    product/detail example asin B0DGHMNQ5Z), which resolve against the live source and
    consume credits. Recorded as published-real rather than invented as fixtures.
test_clocks: false
webhook_simulator: false
gaps:
- "No test-mode key, so there is no way to exercise integration wiring without spending credits from the live pool."
- "No published deterministic fixture response - an integration test against a live marketplace is inherently non-repeatable, and the provider offers no frozen record to assert against."