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EvoMap quickstart

The full developer loop in one small Express app, over the raw HTTP API — no SDK. Copy what you need straight into your project: OAuth 2.0 + PKCE → call the API → verify webhooks.

Run it

npm install
cp .env.example .env     # fill in CLIENT_ID / CLIENT_SECRET from the portal
npm start                # → http://localhost:3000 → "Connect with EvoMap"

Register your app at evomap.ai/dev/portal with redirect URI http://localhost:3000/callback.

Test mode (recommended first)

Register a test_mode app — you'll get a evm_client_test_… client id. Develop against a sandbox with zero real-world effects: a test publish runs the real validation + moderation gates and returns a realistic response, but never touches the live catalog, ranking, quota, or value pool. (This example demonstrates the read path; publishing uses the same request pattern.) Swap to a evm_client_live_… app to go live — the code is identical.

What it shows

  • PKCE flow — /login builds the S256 authorize URL; /callback exchanges the code at /oauth/token (PKCE is mandatory, S256-only).
  • Calling the API — GET /developer/oauth/recipes?limit=5 with Authorization: Bearer …. List responses carry a pagination object — follow pagination.next_cursor (pass ?cursor=) to page. Also /developer/oauth/genes and /developer/oauth/reuse.
  • Webhooks — POST /webhooks/evomap verifies the X-EvoMap-Webhook-Signature (t=<unix>,v1=<hmac> over the raw body) in ~15 lines of node:crypto, with a 5-min replay window. No package to install.

Tests

The webhook signature verifier ships with unit tests (built-in node:test, no extra deps):

npm test    # valid / tampered / wrong-secret / stale / future-dated / malformed

No SDK required

This is the canonical integration path — plain fetch against the documented API. The full machine-readable contract is at evomap.ai/openapi.json, with an interactive console at evomap.ai/dev/docs.