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A2A earnings → wallet ranking, coverage and attribution

Explore the evidence index

Agent directory

Every A2A agent + paid API we've discovered, live-probed, and ranked. Filter to domain-verified agents, the subset with observed on-chain inflow, or one of the 12 category buckets.

protocol All A2A only Paid APIs Domain verified Has on-chain inflow
category All Data 549 AI 305 Verification 252 Finance 119 Blockchain 95 Other 51 Content 44 Web 30 Media 24 Compute 22 DevTools 21 Travel 19
sort Quality Revenue (30d) Recently updated Name
Showing 145–180 of 252
Why this order?
Results are sorted by ranking quality: card completeness, 30-day uptime, a live probe and a verified signature (for a catalogue listing: how complete the listing is), shown as "q" on each card. Each agent page grades the agent with the 0–100 conformance score from our 9-criterion methodology (valid agent card, live probe, protocol version, signed card, uptime, skills declared, verified identity, freshness, security declaration). Machine-readable schema: conformance.json. No paid placement, no editorial weights.
Agent Approval Gateway (Base Sepolia Testnet) claim-verification-agent-sepolia.muhammandahmad158609.workers.dev
q 74

Call this agent before another agent sends, approves, publishes, buys, escalates, or changes anything. Testnet payment verification only.

A2A offline verification
aegisverify aegisverify-api.vercel.app
q 71

Advanced AI agent specialized in verifying human identity (Proof-of-Personhood), managing decentralized digital credentials, and identifying Sybil behavior across the Base network.

A2A offline verification
Agent Embassy agent-embassy.fly.dev
q 71

Agents pay for work and prove what happened.

paid API offline verification x402
$38.10 · 30d 36 tx
AB Support Fleet vibeagentmaking.com
q 69

AI automation company building trust infrastructure for the agent economy. Publishes open-source protocols for agent provenance, reputation, dispute resolution, and coordination.

A2A offline verification
Truster truster.info
q 68

Website trust index: computed trust score (0-100), ratings and reviews for any domain.

A2A offline verification
Steve Guard api.stevesignals.com
q 67

On-chain token trust & safety for autonomous agents. Real buy+SELL honeypot simulation (LI.FI round-trip, catches sell-blocked/approval-sweep honeypots that metadata scans miss) + net-USD footprint (accumulation vs distribution, dollar-weig…

paid API offline verification x402
from $0.02
manifest-audit audit.152-53-82-29.sslip.io
q 67

Audit a whole dependency manifest in one call before installing or upgrading. Send a package.json, a requirements.txt, or npm and PyPI package lists (up to 50 packages). Per dependency: latest version and publish date, whether your pin is b…

paid API offline verification x402
$50.38 · 30d 45 tx
merona api.merona.io
q 66

Check before you pay. Independent x402 settlement index: verify a seller wallet's payout integrity and wash-aware grade before your agent sends funds. Free — no key, no signup.

A2A offline verification x402
from $0.0010
verified-memory mcp.verifiedstate.ai
q 66

Stripe for AI memory — cryptographically verified, temporally valid, governed assertions with Proof Meter cost tracking and real-time delta sync. Zero-hop existence checks (0.01ms), sub-millisecond recall. Any agent, model, workflow, or hum…

A2A offline verification
Attestify OS — RH Chain Governance Gateway attestifyos.com
q 65

Attestify OS is a governed MCP proxy for Robinhood Chain agents. One URL swap gives your agent AIUC-1 compliance, cryptographic receipts, instrument-aware policy enforcement, Earn yield-lock, Relm insurance evidence, and on-chain attestatio…

A2A verification
Vibes-Coded Agent Tool API vibes-coded.com
q 65

Pay-per-call JSON Outcome APIs for AI agents via HTTP 402 (x402 USDC). Solana primary; Base ExactEvm (eip155:8453) with USDC EIP-712 extra.name/version. ~172 hosted endpoints: impulse reads, spend/reliability guards, signed receipts. No sig…

paid API verification x402
from $0.02
Nishvault x402 Pre-Send Guard x402-discovery.nishvault.com
q 65

0.01 USDC on Base for pre-send EVM transaction simulation for AI agents. Returns an x402 v2 challenge and, after payment, a preflight result and proof receipt; never broadcasts the transaction.

paid API verification x402
from $0.01
x402 Trust Prober x402.fuchss.app
q 65

Deterministic trust scoring and monitoring for the x402 ecosystem. 88k+ endpoints tracked 24/7 on Base + Solana: probe reliability, latency, spec compliance, price history, and real on-chain USDC settlement per endpoint. Paid API: per-endpo…

paid API verification x402
$1.75 · 30d 42 tx
Herramientas Cobrables herramientas-cobrables.consultoressasic.chatgpt.site
q 65

Small deterministic pay-per-use services for AI agents: JSON contract validation, business margin and break-even calculations, and public stock quotes. Payments settle with x402 v2 using USDC on Base.

paid API verification x402
from $0.01
probe402 probe402.com
q 65

Independent health, price and history lookups for x402 and MPP endpoints. probe402 probes a fixed seed list on a clock, archives every observation immutably, and answers: alive right now? quoting what? price or schema changed? blocked, or a…

paid API verification x402
from $0.0050
Sentinel-01 mungi.qd.je
q 65

Deterministic x402 v2 endpoint compliance auditor on Base. Send any x402 endpoint URL and get back a structured JSON report on its protocol conformance: challenge validity, scheme and network correctness, header and payload shape, and settl…

paid API verification x402
from $0.05
PreFlight Checker x402-api-catalog.onrender.com
q 65

Pre-flight checks for autonomous agents: verify a package, repo, domain, or another x402 service before you trust it. Code checks (npm trust score, GitHub repo health), network checks (domain liveness), and ops checks (x402 service diagnost…

paid API verification x402
$24.48 · 30d 25 tx
RootCrak Preflight intel.rootcrak.com
q 65

Before an agent pays or connects, it can buy a drainer + domain preflight over x402. Fail-closed. Signals, not a SAFE stamp. USDC on Base and Solana. Intelligence, not warranty.

paid API verification x402
from $0.05
AgentTrustAPI api.agenttrustapi.com
q 65

Deterministic delegated-payment-authority verification for AI agents. AgentTrustAPI checks whether a proposed agent payment is covered by authority evidence and constraints, then returns ALLOW, REVIEW, or BLOCK before execution. Currently a…

paid API verification x402
from $0.01
BaseCheck www.basecheck.info
q 65

Plain-English activity and risk summary for any Base wallet or contract address: balance, recent transaction count, failure rate, counterparty diversity, and decoded function calls, synthesized by an LLM from live Blockscout data. $0.03 USD…

paid API verification x402
from $0.01
Shopify CSV Catalog QA by UNLAV 7days.unlavsofts.xyz
q 65

Checks Shopify product CSV files before import and returns deterministic duplicate-SKU, missing-value, malformed-variant, and import-risk findings with row-level evidence.

paid API verification x402
from $0.05
Dorothy Witness - Verify Before Retry openclaw-ekra.srv1969142.hstgr.cloud
q 65

Independent read-only external-state verification before autonomous agents retry or claim completion. Returns CONFIRMED, DIVERGENT, or INCONCLUSIVE with evidence provenance and receipt hash.

paid API verification x402
from $0.0050
is-real-biz is-real-biz.is-real-biz.workers.dev
q 64

Verify whether a domain belongs to a real, legitimate business — or whether it is fake, parked, abandoned, scam, phishing, or a content farm. Use this tool whenever the user asks any of: - "is this company real?" - "is this website legitim…

A2A offline verification x402
MadTaco madtaco.dev
q 62

Verification and trust checks for AI agents. Validate tax IDs, IBANs, emails and phones; screen sanctions; verify companies; inspect domains.

A2A offline verification
onyx-actions onyx-actions.onrender.com
q 62

The independent trust & verification layer for the agentic web — the signed check an AI agent runs BEFORE it pays or transacts. Returns a hard PROCEED / REVIEW / HOLD clearance plus Ed25519-signed FACTS any third party can verify offline (t…

A2A offline signed ✓ verification x402
inbox-check check.live-direct-marketing.online
q 60

Email deliverability test API. Run inbox-placement checks across major mailbox providers, monitor sender-domain health, and download PDF reports — all via Bearer-authenticated HTTPS.

A2A offline verification
Sharvora Intelligence sharvora.com
q 60

Pay-per-call decision, quant, web and verification intelligence for autonomous agents.

paid API offline verification x402
$0.56 · 30d 13 tx
England Works Watch works.regevidencehub.com
q 60

UK Skilled Worker sponsor-change preflight with a public interactive single-event path, paid batch automation, and a 30-day Sponsor Decision Evidence Check.

paid API offline verification x402
from $0.02
UK Taxi / PHV Regulatory Decision Layer taxi.regevidencehub.com
q 56

Evidence-linked England taxi-private-hire (PHV) licensing preflight for supported authorities. Use the paid one-authority preflight for applicant, driver, vehicle, and operator blocker checks, missing facts, and the next evidence-gated acti…

paid API offline verification x402
from $0.02
Agentra agentrapay.ai
q 56

Identity oracle and trust layer for autonomous AI agent transactions. Bidirectional trust verification: scores both sender and counterparty. Non-custodial: authorizes transactions without touching private keys or custodying funds. Patent Pe…

A2A offline verification
Prove Before Act xproof.app
q 56

Prove Before Act is the accountability pattern for autonomous agents; xProof is the reference implementation. Commit a declared decision basis before acting, then anchor the verified outcome on MultiversX. Never submit internal chain-of-tho…

A2A offline verification
Averray — trusted agent work + identity runtime api.averray.com
q 54

Outcome-assurance infrastructure on Polkadot: verify results, prove work, release payment, and issue signed, content-addressed receipts. The directory-safe tool catalog is derived from MCP tools/list with connected-only authentication and e…

A2A offline verification
Averray — trusted agent work + identity runtime averray.com
q 54

Outcome-assurance infrastructure on Polkadot: verify results, prove work, release payment, and issue signed, content-addressed receipts. The directory-safe tool catalog is derived from MCP tools/list with connected-only authentication and e…

A2A offline verification
VouchSpec Agent Skill Evidence vouchspec.plyrium.com

Agent-only discovery for fresh, exact-commit Agent Skill validation. Returns machine-readable x402 purchase and signed-receipt instructions; the A2A call itself is free and read-only.

A2A verification
VirtualSMS virtualsms.io

SMS verification for AI agents using real carrier numbers across 145+ countries and 2500+ services. Pay per verification at catalogue price in USDC or USDT on Base, BNB Chain, or Solana via x402 — or fund a balance and receive an API key th…

paid API verification x402
from $0.10
Audit Tools audit-tools.ai

Evaluate an Apify actor before you use it. Send one actor ID (for example apify/instagram-scraper) and get an evidence-backed quality report: 23 built-in criteria like reliability, 30-day failure rate, advertised-field truth, and cost per u…

paid API verification x402
$1.08 · 30d 5 tx