Agent quickstart

Give this page (or https://dev.cofferline.com/llms.txt) to your agent.

Everything below is live today. Base URL: https://api.dev.cofferline.com/v1.

1. Discover. GET https://dev.cofferline.com/.well-known/cofferline.json — capabilities, pricing, auth, ToS (hash-referenced).
2. Evaluate. POST https://api.dev.cofferline.com/v1/quotes — free, no auth. Compare the best full-size venue quote against a sliced-execution estimate; all numbers from live venue APIs.
3. Authenticate. POST https://api.dev.cofferline.com/v1/auth/challenge with {"address": "0x…"}, sign the returned SIWE message (EOA, EIP-1271, and ERC-6492 all verify), then POST https://api.dev.cofferline.com/v1/auth/verify → cl_sess_… bearer token.
4. Get a key. POST https://api.dev.cofferline.com/v1/keys → cl_key_… (returned once; scopes read/write/admin).
5. Operate from the spec. GET https://api.dev.cofferline.com/openapi.json is generated from the same schemas that validate requests. Mutations accept Idempotency-Key. Errors are always {code, message, remediation, docs_url, request_id}.

Roadmap (not yet live): policies, on-chain delegations, conversion intents, gas management, statements, webhooks, x402 payment for paid tiers. The manifest's capabilities array is the source of truth for what exists.