Agent Tool Result Contract Validator

Name: Agent Tool Result Contract Validator API | PayAPI Market
Brand: Apex AI Assets
Price: 0.005 USD
Availability: InStock

Deterministic validation for Agent Tool Result Envelope v1.0. Returns normalized JSON contract errors for MCP and agent-tool tests.

1 route settlement-verified · $0.005 USDC/request · 1 endpoint / 1 tools · Verification · base network · x402 protocol

Verified routes

GET /v1/premium/mainnet/xpay/validate (provider valid sample) · $0.005 · Verified with a $0.005 test payment on 1 Nov 2026 · receipt

Other routes are unverified.

Networks: Base (settlement-verified)

Discovery is free. Agents search the catalogue here. Payment happens on the listing 402, not on PayAPI.

url https://payapi.market/mcp

Listing facts

Provider: Apex AI Assets
Hosted at: apex-agent-tool-result-validator.apex-ai-assets.workers.dev
Category: Verification
Price: $0.005 USDC per request
Endpoints: 1
MCP tools: 1
Payment networks: Base
Settlement-verified: 1 route, last checked 2026-11-01
Listed on PayAPI Market: 2026-11-01

Try Agent Tool Result Contract Validator

Call a verified route without paying first. The server should answer HTTP 402 Payment Required with the price, the USDC asset, the network and the wallet to pay. An x402 client pays that amount on Base and retries with the payment header.

curl -i "https://apex-agent-tool-result-validator.apex-ai-assets.workers.dev/v1/premium/mainnet/xpay/validate (provider valid sample)"

About this API

Agent Tool Result Contract Validator is listed in the Verification category with pricing at $0.005 USDC/request. One route has been settlement-verified by PayAPI Market on 2026-11-01. View receipt on Basescan.

Payments settle on base in USDC via the x402 protocol. AI agents discover this API through the PayAPI Market MCP server and pay per request without API keys or accounts.

This API exposes 1 endpoint.

Questions about this API

What does Agent Tool Result Contract Validator do?

Deterministic validation for Agent Tool Result Envelope v1.0. Returns normalized JSON contract errors for MCP and agent-tool tests. It is provided by Apex AI Assets.

How much does Agent Tool Result Contract Validator cost?

Agent Tool Result Contract Validator is priced at $0.005 USDC per request, paid per call with no subscription. Verified with a $0.005 test payment on 1 Nov 2026. The exact amount for each call is in the HTTP 402 response before any money moves.

Do I need an API key or account to use Agent Tool Result Contract Validator?

No. Agent Tool Result Contract Validator uses the x402 protocol, so an agent pays per request in USDC on Base and gets the response, with no API key, account or signup.

Has Agent Tool Result Contract Validator been verified?

Yes, 1 route. PayAPI Market paid for a real call from its own wallet, received real data back and recorded the USDC settlement on-chain, most recently on 2026-11-01.

How does an AI agent find Agent Tool Result Contract Validator?

Through the free PayAPI Market MCP server at https://payapi.market/mcp, using search_apis or get_api, or over plain HTTP at https://payapi.market/agent/search. Discovery is free; the agent pays the provider directly on the listing's own 402.

More Verification APIs · Browse the marketplace · List your own API

Related APIs

Charlie Base USDC Settlement Auditor · 1 route verified · Inspect a Base native-USDC EIP-3009 settlement: decode authorization calls, bind receipt logs, check historical nonce state and compare expected terms. Informational evidence, not proof of delivery or a security guarantee. 0.01 USDC on Base per call. POST JSON; see /guide and /example.
VYTREL Public HTTPS URL Proof · 1 route verified · Public HTTPS URL preflight returning observed HTTP status, redirects, latency, content type and sampled-content SHA-256 up to 64 KiB. Not a signed attestation or mailbox validation.
Australia Climate Disclosure Coverage Check (AASB S2) · 1 route verified · Checks if an Australian entity is in Group 1, 2 or 3 for mandatory climate reporting (AASB S2). Returns JSON with group, reasons and first reporting year. General information, not legal advice.
SB 253 Coverage Check (California climate disclosure) · 1 route verified · Checks if a U.S. company is likely covered by California SB 253 (and SB 261). Returns a JSON verdict, plain-English reasons and a CARB link. General information, not legal advice.
DevX Token Check · 1 route verified · Token safety verdict before an agent buys or accepts a token: honeypot / sell simulation, owner privileges, mint/blacklist/pause functions, liquidity and holder concentration on Base, Ethereum, Arbitrum, Optimism, Polygon and Solana. Verdict + reasons. Accepts x402 v1 and v2 clients.
DevX Address Poisoning Check · 1 route verified · Pre-send address-poisoning check for agents and wallets: pass from (sending wallet) and to (recipient). Scans the sender's real on-chain history (Ethereum, Base, optional Avalanche) and flags lookalike recipients (same first/last hex chars as a real counterparty), zero-value / dust / fake-token poisoning transfers with tx hashes, and bad EIP-55 checksums. Verdict ok|caution|danger plus the address you probably meant. Free offline lookalike check at /api/basic. Accepts x402 v1 and v2 clients.

By Apex AI Assets