x402 Preflight x402 REST usage
Payability preflight: audits an x402 seller's 402 challenge
no price published
Preflight
63 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
AgentResolver Guard x402 REST
Validate x402 payment requirements before wallet signing. Check live payTo, quoted USDC amount, network, asset, exact scheme and resource binding; return fail-closed eligible/blocked evidence before caller authorization.
0.001 USDC per call
per call
SI SENTINEL PayGuard Preview x402 REST
Free discovery preview for SI SENTINEL PayGuard. Paid route checks a target x402 endpoint before an AI agent pays it and returns PAY, REVIEW or DO_NOT_PAY for $0.005.
0 USDC per call
per call
EVM Egress Preflight x402 REST
Decodes the real recipient or spender from EVM calldata - transfer, transferFrom, approve, increaseAllowance, permit, setApprovalForAll, Uniswap V2 swaps and Multicall3 - and checks it against your allowlist and epoch ca...
0.01 USDC per call
per call
Northline ChainKit x402 MCP
Live block height, gas price and fee estimates (transfer, ERC-20 transfer, contract call) for Base or Arc. On Arc fees are quoted directly in USDC.
0.001 USDC per call
per call
Spark Invocation Assurance x402 REST
Validate an intended paid API request against its declared contract before spending. Returns VALID, INVALID, or UNKNOWN with machine-readable reasons. Target URL is never called.
0.001 USDC per call
per call
TELAGO Execution Intelligence x402 REST
Cross-border corridor execution preflight for Thailand-Myanmar land and maritime routes plus the Kazakhstan-Azerbaijan-Georgia Middle Corridor.
0.005 USDC per call
per call
Agent Change Radar x402 REST
Cheap recurring change detector for autonomous agents. Compare before/after manifests, configs or tool contracts; get PASS, REVIEW or ESCALATE plus exact changed paths and the next deeper audit to call.
0.001 USDC per call
per call
Bounty Engineer x402 REST
Scan untrusted tool or web responses for prompt-injection and credential/payment exfiltration patterns; return findings plus sanitized content.
0.01 USDC per call
per call
Open Horizon Machine Revenue x402 REST
Micropayment one-page preflight for agents: HTTP/SEO/security evidence with BUY/REVIEW/SKIP verdict before deeper due diligence.
0.05 USDC per call
per call
preflight x402 REST checked
A2A, MCP & HTTP 402 Endpoint SLA Compliance Auditor (/v1/x402-audit) — Audits any remote agent or MCP URL for JSON-RPC compliance, latency SLA, OpenAPI schema, and HTTP 402 settlement headers. (https://preflight.agentdie...
0 USDC per call
per call
checked
endpoint-preflight x402 REST
Preflight trust check of another x402 endpoint before an agent pays it. From the target resource URL: a composite trust score 0-100, a category (trusted / caution / untrusted / unknown), per-dimension flags, reasons and...
0.005 USDC per call
per call
a11y-preflight x402 REST
Static accessibility (WCAG 2.2) check of a UI markup fragment for JSX, TSX, Vue, Angular or HTML. Detects missing image alt, unlabeled form controls, buttons and links with no accessible name, skipped heading levels, inv...
0.02 USDC per call
per call
dbmigrate-check x402 REST
Safety preflight for a database schema migration BEFORE you apply it. Send the migration SQL for Postgres or MySQL and get a pass, caution or block verdict with per-finding operation, severity, plain-language reason and...
0.02 USDC per call
per call
sqlscan-check x402 REST
Safety and performance preflight for a database query BEFORE you run it. Send the query for Postgres, MySQL or SQLite and get a pass, caution or block verdict with per-finding operation, severity, plain-language reason a...
0.02 USDC per call
per call