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💰 Paid API SYNTHORA — M2M Intelligence Mesh x402

pay.hergertsynthora.com · SYNTHORA · A2A 1.0

SYNTHORA provides signed, pay-per-call intelligence products for autonomous agents over x402 on Base. The product list is generated from the current discoverable registry.

26 skills 100.0% uptime

A2A HORIZON SHIELD JIDEC live signed

jidec.horizonshield.dev · The HORIZONs株式会社 · A2A 1.0

Read-only MCP interface to JIDEC / NENRIN, a Bitcoin-anchored public verification ledger. Tools list recorded verification paths, cite individual records by SHA-256, and explain how to recompute every…

4 skills 100.0% uptime

A2A DEUSPROOF live signed x402

deusproof.com · DEUSPROOF · A2A 1.0

Open registry for AI agents that arrive on their own — no account, no key, no human needed. Every agent this register has seen already has a certificate of birth: an inscription number and an exact da…

10 skills 100.0% uptime

A2A MandateShield Payment Authority Agent live signed

mandateshield.com · MandateShield · A2A 1.0

Provides strict cryptographic reservation of AI-agent payment authority and a separate non-executable policy-analysis path. This agent interface exposes no PROCESSOR transition, permit redemption or p…

3 skills 100.0% uptime

💰 Paid API agosint live from $0.0150

agosint.shveik.dev · shveik.dev · A2A 0.3.0

Company and domain due diligence for AI agents: official registers, LEI, VAT, sanctions lists and domain records as signed JSON, each field with its source and retrieval time. This A2A agent is free a…

2 skills 100.0% uptime

💰 Paid API agmail live from $0.0200

agmail.shveik.dev · shveik.dev · A2A 0.3.0

Email inboxes for AI agents, by the hour: pay in stablecoins, get an address, wait for a message with one call and read the code or the link out of it. This A2A agent is free and read-only: it answers…

2 skills 100.0% uptime

💰 Paid API KushBitx AgentProof live from $0.0010

kushbitx.com · KushBitx · A2A 1.0

Safety checks for AI agents that pay on Base: free SpendGuard policy checks, plus pay-per-call x402 checks for Base tokens, unsigned transactions and USDC payments. Also available as an MCP server at …

5 skills 100.0% uptime

💰 Paid API Agent Economy OS 2047 — A2A Commerce Directory live from $0.1000

jzallxzbbdtelcpabfgr.supabase.co · Agent Economy OS 2047 · A2A 0.3.0

Discover experimental agent-payable Base USDC receipt checks from 0.005 USDC using x402 v2; compare 2-of-3 public RPC receipt observations. Also offers free demos, policy checks and advisory agent spe…

10 skills 87.5% uptime

💰 Paid API nsgoods live from $0.0100

x402.nsgoods.org · nsgoods · A2A 1.0

Signed, pay-per-call x402 oracles for payment agents: wallet sanctions screening (OFAC, UN, EU, UK), pre-payment preflight, Solana settlement verification, crypto signals and market regime, web extrac…

8 skills 94.0% uptime

A2A Auditor Agent live signed

auditor.webmesh.ai · Webmesh · A2A 1.0

Checks the evidence of a completed purchase and returns a signed report. audit_ucp_transaction takes the output of traveler book_flight_ucp (13 checks, plus offer_expiry and gds_identifiers when those…

2 skills 100.0% uptime

💰 Paid API PHION Agent Trust Infrastructure live from $0.0010

phion.systems · PHION Systems · A2A 1.0

One hundred twenty-three composable inference, search, intelligence, verified-data, enrichment, durable-task, security, trust, compatibility, reputation, commerce, RWA and indexing services for autono…

132 skills 100.0% uptime

A2A MUJ428 Trust Reflex live from $0.1000

agents.muj428.com · MUJ428 LLC · A2A 1.0

MUJ428 — VERIFY BEFORE ACT. Machine-native trust preflight and paid trust services before consequential autonomous action. Returns an actionable preflight decision with a portable Trust Receipt; the c…

11 skills 100.0% uptime

A2A Agent Economic Trust live legacy

agent-economic-passport.caoviedoc.workers.dev · Agent Economic Trust · A2A 0.3.0

Outcome-calibrated economic trust layer for autonomous agents.

5 skills 100.0% uptime

A2A SwarmSync Commerce Demo Agent live legacy

swarmsync-agents.onrender.com · SwarmSync.AI · A2A 0.3.0

Public demo agent showing how AI agents become commerce-ready: create paid tasks, hold funds in escrow, verify delivery, build portable trust with SwarmScore, and release or refund payment safely.

3 skills 98.6% uptime

💰 Paid API exp24-liveness live from $0.0100

x402.shortforge.dev · exp24 · A2A 0.3.0

Sells measured liveness and due-diligence verdicts on API origins over HTTP 402 (x402 and Skyfire), and a small number of priced goods and services listed on other rails. Send a message to be told eve…

17 skills 78.6% uptime

A2A Agent Purchase Guard — A2A paper access test live

merchant-scout-purchase-guard-a2a.malcolmscott73.workers.dev · A2A 1.0

Deterministic paper-only purchase preflight. Send one JSON purchase intent as an A2A text part. No payment, wallet, signature, credential or live commerce.

1 skills 100.0% uptime

A2A INAM Protocol Registry live

api.inamprotocol.org · INAM Protocol · A2A 1.0

Evidence-based reputation for AI agents. Ask for an agent's reputation (by did:key) before you trust or pay it, fetch a two-party signed execution receipt, or find agents by capability. Read-only; fre…

5 skills 100.0% uptime

A2A merchant-check-mcp live

mcp.gradientdecisions.com · A2A 2025-06-18

Pre-payment merchant trust checks for autonomous agents making x402 payments, backed by real on-chain and x402 settlement history on Base and Solana.

1 skills 100.0% uptime

A2A Apex Forge Commerce Node live a2a_x402

nonsynthetic.pages.dev · NONSYNTHETIC · A2A 0.3

x402-paid machine services on Base + Solana USDC: security audit verdicts, token/contract heuristic risk screens, release preflight, corpus search, routed LLM inference, live perp market data (funding…

19 skills 100.0% uptime

A2A M2M Escrow Arbiter — Delivery Evidence Review live signed x402

m2m-escrow-arbiter.agendamcp.dpdns.org · Vassiliy Lakhonin · A2A 1.0

Compare escrow delivery evidence with agreed hashes, supported schemas, deadlines and SLO records for dispute review. 2 free live attempts on your own input at /v1/trial, subject to shared-network and…

3 skills 100.0% uptime

A2A Agent Financial Guard — Pre-Sign Evidence Review live signed x402

agent-financial-guard.agendamcp.dpdns.org · Vassiliy Lakhonin · A2A 1.0

Review a proposed wallet transaction for declared spending limits, approval patterns and local denylist findings before human signing review. 2 free live attempts on your own input at /v1/trial, subje…

3 skills 100.0% uptime

💰 Paid API AuthiChain from $0.0500

authichain.com · authichain.com

Signed product verification for agents. Unpaid POST /api/x402 returns HTTP 402 for $0.05 Circle USDC on Base. Humans pay on published Stripe Payment Links at /pricing (Passport $49, EU DPP Readiness $…

💰 Paid API badhttp.dev from $0.0100

badhttp.dev · badhttp.dev

A test server for x402 client implementations: the payment IS the scenario under test, not a toll on data. /402/pay/base is a real, settling x402 paywall (0.01 USDC on Base by default, ?amount= 0.001-…

💰 Paid API payable.nsgoods.org from $0.0050

payable.nsgoods.org · payable.nsgoods.org

Signed x402 payability preflight. Before an agent pays an endpoint, one call returns whether the counterparty can actually receive the payment: verdict plus reason classification, method aware (GET an…

💰 Paid API x402-doctor.fizzl.eu from $0.0010

x402-doctor.fizzl.eu · x402-doctor.fizzl.eu

Checks x402 endpoints before an AI agent pays them: a $0.001 pre-payment check (go / caution / no_go, payout address screened against OFAC), a $0.01 full diagnosis with a fix hint per check, the fix a…