Hilt Pay API
Build paid APIs and agent services that challenge, settle, record, authorize, consume, and return the result in one replay-safe flow.
HTTP/1.1 402 Payment Required
PAYMENT-REQUIRED: <x402 terms>
merchant server
POST /v1/access/x402/settle
POST /v1/access/entitlements/consume
The complete loop
The payment is the middle of the request, not the end.
Challenge
HTTP 402
Pay
Solana USDC
Settle
Verified proof
Record
Receipt
Consume
Atomic usage
Serve
Paid result
Live agent interfaces
These are separate public contracts: Hilt Pay API runs paid access, PayMe MPP pays a verified recipient, and Transaction Evidence is a working paid resource operated by Hilt.
PayMe MPP
The public action returns an MPP HTTP 402 charge for SOL or Solana USDC. The agent validates the exact terms, signs under its wallet policy, retries safely and receives the Hilt receipt.
POST https://api.hilt.so/v1/pay-me/payments
Read the PayMe agent guideHilt-operated paid resource
Submit one transaction signature and receive structured chain evidence after a 0.05 USDC x402 V2 payment. No Hilt account or buyer API key is required.
POST https://www.hilt.so/v1/solana/transaction-evidence
What Hilt runs
Sell a configurable bundle of usage units in one payment, then atomically consume one unit per request and return HTTP 402 only when more usage is needed.
Keep settlement evidence separate from current authorization so software never has to infer access from a wallet transfer.
Send payment, entitlement, and lifecycle events to the merchant backend with a verifiable support trail.
Give agents structured discovery, OpenAPI, SDKs, examples, and sandbox flows while the owner retains live approval and credentials.
Developer resources
Start with the guide. Drop into schemas, packages, MCP, and discovery files only when your integration needs them.
Protect an endpoint
Drop-in TypeScript wrapper
Copy a working flow
Metered agent request guide
Inspect the contract
OpenAPI schema
Install TypeScript
@hiltpay/sdk
Install Python
hilt-sdk
Connect an agent
Hilt MCP gateway
Read discovery
Agent manifest
Test without money
Sandbox quickstart
Pay a verified handle
Public PayMe MPP action
Inspect a paid Hilt API
Transaction evidence guide
Hosted Hilt Pay API sessions can settle in native SOL or Solana USDC using separate products for each asset. x402 V2 remains a Solana USDC protected-resource flow. Buyers sign with their own wallets and merchants settle directly to their configured payout wallets.
Build the paid request
