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SameDayDesk Payment Offer Preflight
x402
SameDayDesk Payment Offer Preflight is a paid API for AI agents from agents.samedaydesk.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Inspects a public HTTPS endpoint to detect, parse, and evaluate x402 and MPP payment offers before an agent commits to payment.
Price / call$0.005
Success—
StatusUnknown
How this service works
Deterministic agent APIs for web and company intelligence, repository security, agent-work economics, machine-service discoverability, payment preflight and settlement proof, wallet context, and Morpho decision evidence. Pay per call through Base x402 or native MPP, with a Circle Gateway Nanopayments path for gasless batched USDC.
Output
Returns a structured object with a boolean ok, a decision enum (parseable_offer, review_required, or no_parseable_offer), an array of normalized payment offers, the count of offers, the protocols detected (x402, MPP), a parity comparison object, catalog coherence details, the response contract the endpoint claims to return, how to acquire that contract, an array of findings/warnings, boundary conditions, and a checkedAt timestamp.
Example use cases
Audit paywalled API before authorization
“Before my agent calls https://data.someservice.com/reports/latest, run a payment preflight on it and tell me if the payment offer is parseable, what protocols it uses, and whether there are any findings I should know about.”
Compare payment terms across agent APIs
“I want to know the payment offer details on https://agents.competitor.com/intelligence/company-lookup — check if it has x402 or MPP offers, how many there are, and whether the offer structure is coherent enough for my agent to proceed.”
Validate payment contract before wallet spend
“My agent is about to pay for a call to https://api.morphodata.io/decision-evidence — do a preflight check on that URL first and tell me the decision verdict, the response contract it claims to return, and flag any issues in the findings.”
Technical details
Endpoint
GEThttps://agents.samedaydesk.com/gateway/commerce/payment-offer-preflightWhen to prefer
Use this endpoint when an AI agent needs to inspect and validate payment terms on any public HTTPS route before committing funds, especially for x402 or MPP machine-payable APIs. It is the right choice when you need a deterministic, no-side-effect preflight that parses offer structure, checks parity between protocols, and validates the response contract — as opposed to actually executing a payment or just detecting whether a 402 header is present.
Side effects
- URL is not publicly accessible or requires credentials — endpoint cannot inspect it
- URL does not serve HTTP payment challenges — decision returns no_parseable_offer
- Malformed or non-HTTPS URL provided — validation error on input
- Endpoint returns ambiguous or conflicting payment headers — decision returns review_required
- Target URL is unreachable or times out — error response with no decision
- Payment offer schema version mismatch — findings array contains warnings
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"ok": true,
"offers": [
{
"valid": true,
"intent": "exact",
"scheme": "exact",
"network": "eip155:8453",
"protocol": "x402",
"amountAtomic": "20000"
}
],
"parity": {
"compared": true,
"consistent": true,
"driftFields": []
},
"target": {
"url": "https://agents.samedaydesk.com/defi/morpho-position?address=0x8ee9c15c3e5332cbc6ef39a2bb036c63c6549b6e",
"method": "GET",
"httpStatus": 402
},
"product": "samedaydesk-payment-offer-preflight",
"version": "1.2.0",
"boundary": {
"paymentSent": false,
"paymentSigned": false,
"credentialsUsed": false,
"redirectsFollowed": false,
"openApiDocumentRead": true,
"targetResponseBodyRead": false
},
"decision": "parseable_offer",
"findings": [],
"checkedAt": "2026-08-10T20:00:00.000Z",
"protocols": [
"mpp",
"x402"
],
"offerCount": 2,
"catalogCoherence": [],
"responseContract": {
"decision": "admissible",
"exampleStatus": "structurally_consistent",
"requiredPaths": [
"ok",
"title",
"url"
],
"requiredFields": [
"ok",
"title",
"url"
],
"runtimeResponseVerified": false
},
"responseContractAcquisition": {
"path": "/openapi.json",
"maxBytes": 1000000,
"attempted": true,
"sameOrigin": true,
"documentRead": true,
"credentialsUsed": false,
"redirectsFollowed": false,
"targetResponseBodyRead": false
}
}
}Tags
x402
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