API Overview

Expand the API Overview panel on the left to see every endpoint with full details.

Base URL: https://api.grain.inc

Common conventions:

  • Authentication via Bearer tokens (see Authentication & Idempotency).

  • Content-Type: all request bodies are JSON (application/json).

  • Currency: "USD" currently supported.

  • Amounts: strings with two decimals (e.g., "10.00").

Endpoints:

  • Merchants — retrieve merchant profile and supported payment methods.

  • Payment Sessions — create and inspect payment sessions.

  • Connect Wallet — associate a user wallet + stablecoin with a session.

  • Funding Transaction — optionally record the funding transaction hash.

  • Captures — move funds from OTW to merchant wallet (partial/final) and inspect captures.

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