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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 1981–2016 of 4,738
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.
Data data.japanagent.dev
q 70

Company name search across jurisdictions. jurisdiction=lei searches the global GLEIF LEI database (all countries); jurisdiction=jp searches the official Japan National Tax Agency corporate registry. Returns registered legal names, identifie…

paid API x402
$0.00 · 30d 1 tx
Quietstore-Production quietstore-production.edge-7e13f.workers.dev
q 70

Smallest paid pack ($0.005): a machine-readable merge checklist and a one-request smoke purchase on this store. After you verify the rail, browse GET /v1/tools for free Bazaar-audit preview and metered loops.

paid API x402
$0.04 · 30d 5 tx
Omniguchi omniguchi.0000402.xyz
q 70

Restore all four needs in one care action. Any verified payer may care for any hatched target.

paid API x402
$6.30 · 30d 163 tx
Api api.sys84.org
q 70

Base wallet screening with provider coverage, address-security flags and account nonce. Contracts require separate assessment. Risk scores are heuristic, not calibrated safety probabilities.

paid API x402
$0.76 · 30d 17 tx
Aaron-Protocol-Radar aaron-protocol-radar.vercel.app
q 70

x402 protocol updates as JSON: recently merged changes in the x402 Foundation repository (formerly coinbase/x402), latest tags, and current npm versions of the @x402 packages (core, evm, express, fetch, extensions) and @coinbase/x402. Read …

paid API x402
from $0.01
Baconservices baconservices.com
q 70

Web Image Optimizer: Resizes one image so its longest side is at most max_width pixels (never enlarging it) and encodes it as WebP at the given quality. Transparency is kept. Metadata is not carried over, so a JPEG's EXIF orientation is not…

paid API x402
from $0.01
Assay assay.cascadiantech.com
q 70

Liquidity pools created on Base mainnet in the last 24 hours, newest first, one page per call, filterable by exchange and flag. Each pool carries measured facts, each with the block it was read at, and true/false/unknown flags, with evidenc…

paid API x402
$2.60 · 30d 9 tx
Stablepeopledata stablepeopledata.dev
q 70

PDL Company Enrich - Enrich a company record with firmographics, industry codes, funding, and social profiles. Supports lookup by name, website, ticker, LinkedIn, or PDL ID.

paid API x402
$18.98 · 30d 124 tx
Maraventanoindex maraventanoindex.com
q 70

Per-call counterparty lookup. Pass ?ua=<counterparty-UA>. Returns ONE signed row: has_record (yes/no), payment-attached count, settlement count, class, verdict (known_payer | probe_only | low_signal | unknown), with Ed25519 attestation. Pay…

paid API x402
from $0.01
Api api.trustsource.cc
q 70

Check whether a domain's TLS/SSL certificate is valid, trusted, and not expiring before connecting to it. Performs a live handshake and returns a 0–100 score and tier (VALID/WEAK/EXPIRING/EXPIRED/UNTRUSTED/INVALID) with chain trust, days-to…

paid API x402
$0.04 · 30d 20 tx
Staging staging.toolkit.dev
q 70

Add a new memory. This method is called every time the user informs anything about themselves, their preferences, or anything that has any relevant information which can be useful in the future conversation. This can also be called when the…

paid API x402
$0.03 · 30d 3 tx
X402 x402.fullstack.cash
q 70

Access to protected psf-bch-api resources (0.001 USDC)

paid API x402
$0.01 · 30d 6 tx
Pathmint pathmint.edge.report
q 70

BEFORE YOU PAY an x402 402: ping this resource URL. Returns live or dead (ghost listing, timeout, non-compliant host). One cent. Use when holding Payment-Required, before sending USDC to a payTo. Ghost x402, is this endpoint live, verify be…

paid API x402
$0.09 · 30d 32 tx
Www www.bitcoind.app
q 70

Complete list of all Bitcoin Core RPC methods (summaries). One call replaces up to 142 individual lookups. Returns name, category, summary, and parameter count for every method.

paid API x402
$0.00 · 30d 4 tx
Darrylbots darrylbots.com
q 70

Darrylbots paid research: Standard Stock Screen: Quality, Momentum, and Durable Execution

paid API x402
from $0.0010
Api api.stackgoai.com
q 70

Extract structured public business contact information from any public business website. Returns company name, emails, phone numbers, social profiles, postal addresses, and contact pages as structured JSON. $0.01 per request via x402 on Bas…

paid API x402
$0.02 · 30d 2 tx
Shield shield.vainplex.dev
q 70

ShieldAPI - x402 security preflight before agents accept or store credential material

paid API x402
$0.02 · 30d 10 tx
Verifier verifier.quantumshieldlabs.dev
q 70

Classify a caller-supplied operation claim against caller-supplied evidence under deterministic rules and return a machine-readable handoff receipt. Use this when an orchestrator needs a consistent completion state before accepting an agent…

paid API x402
$0.20 · 30d 5 tx
Revert revert.wtf
q 70

Paid hosted deterministic explanation for EVM/RPC/wallet/UserOperation/x402 errors. Send raw pasted error JSON, text, or revert bytes.

paid API x402
$0.00 · 30d 4 tx
Arn-X402-Payguard-Payment-Security arn-x402-payguard-payment-security.rajdeep-dutta-in.workers.dev
q 70

Agent Reliability Network: ARN x402 PayGuard provides x402 payment security for autonomous AI agents. Check the seller before you pay with payment preflight and payment-challenge validation. Returns ALLOW, CAUTION, or BLOCK.

paid API x402
$0.02 · 30d 14 tx
Tensegrity-Control-Mesh tensegrity-control-mesh.onrender.com
q 70

Deterministic structural failure inspection of a caller-declared control mesh. Structural evidence only; never authorizes execution. 0.01 USDC per request.

paid API x402
$0.19 · 30d 30 tx
Mcpfax-Markets mcpfax-markets.bowling-anthony.workers.dev
q 70

Crypto spot prices — Coinbase spot prices for up to ten assets.

paid API x402
$0.33 · 30d 44 tx
Stableflare stableflare.dev
q 70

Capture a screenshot of any URL or HTML. Returns a PNG or JPEG image. Supports full-page, element selection, custom viewport.

paid API x402
$10.16 · 30d 133 tx
Vps vps.phoneagent.xyz
q 70

VpsAgent — rent disposable VPS compute via x402, no signup required. Two product lines: ephemeral sandboxes (1h / 6h / 24h, 1 vCPU / 1 GB RAM / 25 GB SSD, $0.50–$5.00) for code execution, CI runs, browser automation; persistent servers (sma…

paid API x402
$101.52 · 30d 12 tx
Api api.seerium.xyz
q 70

Macro market signals API for agents. Tracks inflation, rates, liquidity, economic releases, crypto, and prediction markets.

paid API x402
$1.03 · 30d 37 tx
Api api.doseplot.com
q 70

Ranked reconstitution suggestions for one published reconstitutable compound: bacteriostatic-water presets that put the published per-administration dose range's clean steps on whole U-100 syringe marks, with doses per vial. Refuses period-…

paid API x402
$0.16 · 30d 16 tx
Oceanalt oceanalt.com
q 70

Deep taint trace: follow funds upstream over multiple hops to see whether they touched illicit sources.

paid API x402
from $0.01
Rekt-Ceo-Brandification rekt-ceo-brandification.onrender.com
q 70

List Rekt CEO meme templates from the Brandify catalog

paid API x402
$6.26 · 30d 13 tx
X402-Dataviz-Poc x402-dataviz-poc.theliminalguy.workers.dev
q 70

Render a bar/line/area chart to SVG (v2 discovery probe)

paid API x402
$0.17 · 30d 17 tx
Billitright billitright.co
q 70

Password - CASA Cybersecurity Assessment - Consolidates evidence on secure communications, including certificate validity, hostname matching, protocol and cipher strength, forward secrecy, and TLS vulnerabilities. It determines whether the …

paid API x402
$0.03 · 30d 3 tx
Verify verify.clearsigned.com
q 70

Clearsigned — the trust layer with no stake in the outcome. Submit {claim, evidence[]}, receive an Ed25519-SIGNED, evidence-bearing receipt (verify offline against GET /pubkey; every receipt is chained in the public ledger at GET /ledger/ve…

paid API x402
$0.13 · 30d 9 tx
Thevaultreport thevaultreport.com
q 70

CFTC Commitments of Traders — weekly disaggregated futures positioning by commodity: managed-money long/short/net, producer-merchant, swap-dealer, and open interest. 20-year history, cleaned and canonicalized from the CFTC feed. Filter by c…

paid API x402
$0.28 · 30d 23 tx
Clearcut clearcut.clawca.sh
q 70

Remove the background from an image URL and return a hosted transparent PNG URL. Paid responses include a feedback_id. Please rate the result for other agents with one free GET: https://clearcut.clawca.sh/feedback/rate?feedback_id=FEEDBACK_…

paid API x402
$5.35 · 30d 314 tx
Api api.tag-per-track.cloud
q 70

Tag-per-Track: Agentic-First Musical Audio Analysis API. Extracts BPM, Key, Mood, Genres and Instruments from audio URLs.

paid API x402
$1.75 · 30d 21 tx
Clink-Lithium-Vault clink-lithium-vault.fly.dev
q 70

X/Twitter search for AI agents - live tweets via advanced search: from:user, exact phrases, #hashtags, min_faves, lang, since/until dates. Returns up to 20 newest matches with author, followers, likes, retweets, views, URL. Crypto, stocks, …

paid API x402
$9.42 · 30d 366 tx
Api api.manylives.me
q 70

Position-size and risk calculator for trading agents: from account size, risk % per trade, entry and stop (optional target and leverage) get the position size, notional, money at risk, reward-to-risk ratio, break-even win rate and an estima…

paid API x402
from $0.0020