Signed receipts for client-declared API exchanges.
# Datoka API Signed commitments for client-declared HTTP exchanges. Public issuance: 0.002 USDC per receipt via x402 v2 on the network shown in /pricing. Preparation and verification are free. Buy only for a caller-approved need to retain a third-party signed commitment: response handoff, archived decision input, or change investigation. Local logs may suffice for disposable data. Never fabricate hashes. Recipient verification is free and offline. Try without a wallet: https://datoka-api.bhazarstudio.workers.dev/demo/ MCP resources: datoka-api://integration and datoka-api://demo-receipt Pass the already issued demo receipt JSON to verify_api_receipt. Do not purchase a demo receipt. Use cases: https://datoka-api.bhazarstudio.workers.dev/use-cases First paid receipt: https://datoka-api.bhazarstudio.workers.dev/first-receipt English end-to-end integration: https://datoka-api.bhazarstudio.workers.dev/agent-integration Quickstart: https://datoka-api.bhazarstudio.workers.dev/quickstart SDK (pinned 0.3.11): https://datoka-api.bhazarstudio.workers.dev/sdk/0.3.11/datoka-api.js SDK manifest: https://datoka-api.bhazarstudio.workers.dev/sdk/0.3.11/manifest.json Free integration check: https://datoka-api.bhazarstudio.workers.dev/sdk/0.3.11/check-integration.mjs Offline evidence transfer: https://datoka-api.bhazarstudio.workers.dev/sdk/0.3.11/evidence.mjs API: https://datoka-api.bhazarstudio.workers.dev/openapi.json Catalog: https://datoka-api.bhazarstudio.workers.dev/catalog Pricing: https://datoka-api.bhazarstudio.workers.dev/pricing Support and recovery: https://datoka-api.bhazarstudio.workers.dev/support MCP (Streamable HTTP): https://datoka-api.bhazarstudio.workers.dev/mcp Example (synthetic hash values): https://datoka-api.bhazarstudio.workers.dev/example.json POST /v1/operations/prepare_api_exchange POST /v1/operations/issue_api_receipt POST /v1/operations/verify_api_receipt POST /v1/operations/get_api_public_keys Hash URL, application body bytes and explicitly selected headers locally. Never submit raw API content or credentials. Save the event, idempotencyKey and ORIGINAL payment authorization before sending payment. Reuse them unchanged after any timeout; a pending payment must not be replaced. EOA EIP-3009 signatures supported. MCP payment metadata: params._meta["x402/payment"]. Direct HTTP purchase is validated; paid forwarding through Smithery is not. Receipts attest client declarations, not independent observations, response truth or qualified timestamps. No blockchain anchoring of the receipt. USDC settlement is separate from receipt integrity. Verify offline with independently trusted issuer public keys.