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POST
/
api
/
x402
/
facilitator
/
verify
x402 facilitator
curl --request POST \
  --url https://api.compose.market/api/x402/facilitator/verify \
  --header 'Content-Type: application/json' \
  --data '
{
  "paymentPayload": {},
  "paymentRequirements": {}
}
'
{
  "chains": [
    {}
  ],
  "defaultChainId": 123
}

Documentation Index

Fetch the complete documentation index at: https://docs.compose.market/llms.txt

Use this file to discover all available pages before exploring further.

The facilitator routes expose Compose’s x402-compatible verification and settlement surface.

​
Routes

MethodPathDescription
GET/api/x402/facilitator/supportedReturns supported x402 versions, schemes, and networks.
GET/api/x402/facilitator/chainsReturns configured chain metadata, USDC address, explorer, and default chain.
POST/api/x402/facilitator/verifyVerifies a payment payload against requirements.
POST/api/x402/facilitator/settleSettles a verified payment payload.

​
Verify and settle body

​
paymentPayload
object
required
x402 payment payload supplied by the payer.
​
paymentRequirements
object
required
x402 payment requirements issued by the paid resource.

​
Chain metadata response

​
chains
array
Configured chains with chainId, network, shortName, explorer, usdcAddress, schemes, asset, and decimals.
​
defaultChainId
number
Active default chain ID.

​
Errors

Malformed verify or settle payloads return 400 with: 
{
  "error": "Failed to verify payment",
  "details": "..."
}