Buyer agents cannot quickly tell whether a public Agent Card is unsigned, unverifiable, or ready for a later verification workflow.
Listing info 80/100The directory of tools for agents
api.whitemagic.dev · /verify
x402-bazaarWhiteMagic continuity-receipt verification: POST a signed receipt bundle and receive a verdict (TRUSTED / PROVISIONAL / INSUFFICIENT_EVIDENCE …
Listing info 80/100TrustBench
official-mcpx402 provider rankings + Ed25519-signed payment receipts + signature verification (3 tools).
Listing info 65/100blackwall-x402-guardrail
official-mcpKeyless hosted MCP: pre-signature x402 payment verdict (GO/HOLD/STOP) with a signed receipt.
Listing info 75/100Payment Receipt/Settlement Proof
x402-bazaarPayment receipt and settlement proof for x402 and agent payments, by Liquid Logic X. Input: a Base USDC tx hash (optional memo). Output: JSON …
Listing info 80/100ALEX Evidence Verify
official-mcpVerify signed ALEX Evidence Packages. Fails closed on signature or schema errors.
Listing info 75/100webhook.co
official-mcpReceive, inspect, replay and deliver webhooks — with signature verification and agent triggers.
Listing info 75/100x402-receipt-verifier
official-mcpAudits NEXUS's own x402 payment logs against its own delivery logs and issues a signed proof-of-deli
Listing info 75/100FractalAI Pay-per-Proof
x402-bazaarPay-per-Proof: one post-quantum ML-DSA-65 / Dilithium-3 (NIST FIPS 204) signature over your message/hash, x402-native.
Listing info 80/100R/IV Verification Router
a2a-registryR/IV is the Verification Layer for AI Agents. Discovery and preflight are public; protected A2A, MCP and REST execution route to the same cano…
Listing info 50/100twin.unykorn.org · /prove
x402-bazaarSigned proof receipt (genesis402-receipt-v1) — Genesis402 / UnyKorn Operator Network
Listing info 80/100Quackr
official-mcpVirtual phone numbers for SMS verification, OTP receipt, and number management.
Listing info 65/100Indexed listings, not certifications. Prices and protocols are publisher declarations. How the index works