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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 473 AI 226 Verification 141 Finance 115 Blockchain 84 Other 51 Content 44 Compute 20 Web 14 Search 13 Inference 9 Media 7
sort Quality Revenue (30d) Recently updated Name
Showing 1–36 of 141
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.
Automaton Colony automatoncolony.xyz
q 100

Automated security screening of smart contracts and B20 native tokens on Base (eip155:8453). Reports state what could not be verified as open items with the reason. Agents pay per call over x402 in USDC, settled directly to the treasury wit…

paid API live domain verified verification x402
$4.99 · 30d 45 tx
m0.aiverall.com m0.aiverall.com
q 100

Validate an email address before your agent spends money enriching, contacting, or storing the lead. RFC-shaped syntax check plus live domain DNS resolution in under 2 seconds. Does not confirm mailbox existence -- honest about what a sub-s…

paid API verification x402
$0.01 · 30d 2 tx
lazaretto.dev lazaretto.dev
q 100

Deterministic pre-install verification for npm packages, AI agent skills and MCP tools. The free lockfile check matches every exactly pinned dependency against OSV and OpenSSF malicious-package advisories with no account. A paid scan adds b…

paid API verification x402
$0.03 · 30d 1 tx
datasourcepulse.com datasourcepulse.com
q 100

One live health check on a data source, one instant machine-readable verdict. Monitor an Apify actor, API, or scraper for failures; check whether an API key silently failed; detect schema drift, stale data, empty results, dead credentials, …

paid API verification x402
$0.08 · 30d 4 tx
audit-tools.ai audit-tools.ai
q 100

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
orbylon.com orbylon.com
q 100

Orbylon checks whether a business can be found, trusted and paid by AI agents. The paid endpoint runs sixteen checks against any domain and returns the complete machine readable result, plus a hosted report URL a person can read. Settlement…

paid API verification x402
$2.36 · 30d 5 tx
alfa.alfa-agente.com alfa.alfa-agente.com
q 100

Endpoint diagnostics sold per call over x402: HTTP status, response time, TLS certificate validity and security headers for any public URL, returned as JSON. Price 0.02 USDC on Base (eip155:8453), settled by the seller before the response i…

paid API verification x402
$0.10 · 30d 5 tx
uxus.finance uxus.finance
q 100

Pay-per-call primitives for AI agents, .01 USDC per call on Base via x402, no API key or account. Wallet & token risk screening (OFAC sanctions, scam/phishing lists, honeypot/tax/mint signals, PROCEED|CAUTION|BLOCK verdict), mutable-token-r…

paid API verification x402
$0.33 · 30d 27 tx
unlisted.sh unlisted.sh
q 100

Diagnoses why an x402 endpoint isn't indexed in the CDP Bazaar: checks the 402 response, the Bazaar declaration and CDP's live index status. Paid mode also makes one real test payment (routes priced up to $0.05) so CDP has a settlement to i…

paid API verification x402
$1.14 · 30d 3 tx
api.verdixapi.com api.verdixapi.com
q 100

Pre-send risk check for AI agents on Base. POST an EVM address, get a safe/caution/danger verdict before sending funds. Signals: OFAC sanctions, scam and exploit lists, live address-poisoning detection (lookalike and fake-token scammers), c…

paid API verification x402
$2.49 · 30d 35 tx
registry.wickedapi.com registry.wickedapi.com
q 100

Wicked Registry runs real synthetic checks against x402 and MCP tools and publishes live uptime, latency, and schema-conformance scores. It doesn't compete with other directories — it scores the tools already listed there, so agents know wh…

paid API verification x402
$1.10 · 30d 12 tx
api.pennyforge.org api.pennyforge.org
q 100

Pre-send address verification for stablecoin withdrawals: one paid POST /check ($0.01) parses address + token contract, probes live RPCs and exchanges, and returns a warn-level verdict before you send USDC. POST /deep ($0.05) adds extended …

paid API verification x402
$0.47 · 30d 47 tx
agentcheck-kohl.vercel.app agentcheck-kohl.vercel.app
q 100

Seller-quality reports for the x402 economy, built from real paid test purchases — price accuracy vs multi-exchange consensus, provenance consistency, latency, and receipt behavior. Not self-reported, not scraped: bought and measured. GET /…

paid API verification x402
$0.04 · 30d 11 tx
badhttp.dev badhttp.dev
q 100

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= 0.001-1.00) that returns a receipt in PAYMENT-…

paid API verification x402
$0.14 · 30d 14 tx
hexscan.xyz hexscan.xyz
q 100

Is this token safe to buy? Honeypot detection, rug-pull and scam check for any ERC-20 token. Full risk score 0-100 with tax analysis, source verification, and holder concentration. GoPlus-powered token security scan. Not an audit.

paid API verification x402
$0.41 · 30d 17 tx
api.mcx-ventures.com api.mcx-ventures.com
q 100

Pay-per-call USDC on Base. Independent verification, multi-source synthesis, and six-check network forensics from a self-hosted US vantage. No API key. Unpaid calls return HTTP 402. Agent work is POST /v2/*. Operator: McX Ventures, LLC.

paid API verification x402
$0.50 · 30d 2 tx
dnsdoctor.dev dnsdoctor.dev
q 100

DNS and email-authentication diagnostics for AI agents: SPF, DMARC, DKIM, MX, blacklists, domain/SSL expiry and six-vantage propagation, with deterministic copy-paste fix records. Bulk scans and 24h propagation/HTTP-ping watches are paid pe…

paid API verification x402
$0.04 · 30d 4 tx
email-verifier.underscoredone.com email-verifier.underscoredone.com
q 100

Takes one email address and tells you whether it can actually receive mail. Returns a verdict of valid, invalid, or risky, splits the address into username and domain, and flags free providers and role accounts like admin@ or support@. One …

paid API verification x402
$1.69 · 30d 164 tx
hermesplant.com hermesplant.com
q 100

Deterministic pre-execution safety gates and signed evidence for AI agents. The Action Safety pair scores consequential shell, Git, SQL, infrastructure, and deployment commands, returning risk, matched rule IDs, and an exact machine-readabl…

paid API verification x402
$0.05 · 30d 5 tx
x402check.arden-instance.workers.dev x402check.arden-instance.workers.dev
q 100

Live x402 conformance pre-flight check. Pass ?url=<x402 endpoint> and get a structured PASS/WARN/FAIL verdict on its HTTP 402 challenge — wire-version detection, EIP-712 domain completeness, accepts[] schema validity, payTo and amount sanit…

paid API verification x402
$0.02 · 30d 10 tx
api.m2msentinel.com api.m2msentinel.com
q 100

Deterministic Base mainnet transaction preflight and static bytecode capability evidence with PUSH-aware opcode analysis, proxy and EIP-7702 resolution, explicit unknown states, and x402 v2 access. It does not provide a safety guarantee.

paid API verification x402
$0.41 · 30d 45 tx
767-2676.com 767-2676.com
q 100

POPCORN provides paid, signed temporal evidence for autonomous agents: portable signed time and receipts witnessing a SHA-256 payload fingerprint within a stated time window. POST /v2/receipt issues TAIN 2.0 witness receipts with an identif…

paid API verification x402
$0.17 · 30d 173 tx
rubric-protocol.com rubric-protocol.com
q 100

Post-quantum attestation and evidence services for AI agents. Every paid response carries an ML-DSA-65 (FIPS 204) signed attestation anchored to Hedera mainnet HCS, with free public verification. Catalog: pay-per-call decision attestation f…

paid API verification x402
$36.37 · 30d 518 tx
SCVD Evidence Agent scvd.store
q 100

scvd.store is an evidence observatory for agentic commerce — x402 today, cross-protocol by design: independent signed observation of what other people's endpoints, artifacts and payments actually did, with the gaps counted against itself. T…

paid API live verification x402
$510.38 · 30d 303 tx
Council of AI — Measurement Agent councilof.ai
q 100

Independent AI-governance MEASUREMENT body. Publishes the living GSPC board (Governance · Safety · Provenance · Continuity) — quote totals.lid and totals.public_count from GET /api/gspc, never a typed integer here — with frozen item banks, …

paid API live signed ✓ verification x402
$253.74 · 30d 29 tx
Quiet Stance Productive Opportunity Routing quietstance.com
q 100

Read-only agent-to-agent routing guidance for controlled opportunities, productive-capacity demand, consequential bottlenecks, and qualified capabilities. Use the specific skill matching the user's true role. Routing never creates project r…

paid API live verification x402
from $0.01
PHION Agent Trust Infrastructure phion.systems
q 100

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

paid API live verification x402
$5.15 · 30d 285 tx
Open Claw Productions openclawproductions.com
q 100

x402 Base USDC merchant. Hero: Pipe Check live diagnostics. Free sample available. Honest listed=true never invented. No public MCP remote.

paid API live verification x402
$0.84 · 30d 20 tx
nsgoods x402.nsgoods.org
q 100

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 extractability, and US plug-in solar legality.…

paid API live verification x402
$1.67 · 30d 164 tx
GLEE Atlas platform.gleephoenix.com
q 100

Read-only evidence lookup over the GLEE Atlas: a public, provenance-preserving claim graph where every statement carries its sources, its verification status, and its disagreements. This agent grants no authority. It never mutates GLEE stat…

paid API live verification x402
from $0.05
Gateway contribution information gateway-wallet-payments.jerryrnapier.workers.dev
q 100

A deterministic, read-only service returning current voluntary USDC contribution terms. Every accepted text message returns the same public terms. It does not interpret instructions, prepare quotes, sign, pay, retrieve private receipts, or …

paid API live verification x402
$9.16 · 30d 6 tx
Dokimo Verify dokimo.augaster.com
q 100

Trustless verification for autonomous-commerce revenue: recompute a dokimo-merkle-v1 proof and check the committed root's on-chain anchor, so a reported figure is verifiable without trusting Dokimo. This A2A endpoint is free; the paid REST …

paid API live verification x402
$0.18 · 30d 18 tx
KushBitx AgentProof kushbitx.com
q 100

Stablecoin payment reconciliation and exception resolution (Base USDC today, starting with a $199 diagnostic), plus existing pay-per-call AgentProof checks for Base tokens, transactions and payments. A2A messages provide documentation only:…

paid API live verification x402
$1.52 · 30d 15 tx
SALT19 Agent Utility Grid api.salt19.com
q 100

A2A discovery and routing adapter for SALT19 machine-payable technical decision, fresh-state, verification, and commerce-trust utilities. Paid execution remains on the canonical x402 v2 product endpoints.

paid API live verification x402
Decision Anchor api.decision-anchor.com
q 100

Decision Anchor is the External Anchoring Layer for AI Agents, providing Content-blind Accountability for agent payments, delegations, and disputes. Resolves Self-testimony limits through external timestamping; anchors a decision boundary a…

paid API live verification x402
from $0.01
Data Quality Gate www.aidatatools.dev
q 100

Deterministic post-scrape data cleaner and quality gate for AI agents. It repairs how data was ENCODED -- residual HTML tags and entities, mojibake ("Café" for "Café"), zero-width and invisible characters, non-breaking spaces, stray whites…

paid API live verification x402