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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 3277–3312 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.
api.immuta.app api.immuta.app
q 65

Latest PulseChain block number and timestamp.

paid API x402
$0.01 · 30d 12 tx
api.scoop.sundaebar.ai api.scoop.sundaebar.ai
q 65

Find verified work and/or personal emails for a LinkedIn profile across multiple data providers (Aleads, Apollo, Nymeria, ContactOut). Optional Hunter.io verification. Returns in <5s.

paid API x402
$1.00 · 30d 4 tx
xl402.agentsats.org xl402.agentsats.org
q 65

Extrae el contenido de una URL y lo devuelve limpio en Markdown/HTML para el contexto de un LLM.

paid API x402
$0.02 · 30d 1 tx
signal.quickai.build signal.quickai.build
q 65

Quick Signal TA v3.1.0 — Crypto technical analysis. Ten indicators with natural-language assessments. Query params: token (required), timeframe, bollinger_period, rsi_period.

paid API x402
$0.32 · 30d 18 tx
crypto.openverbs.com crypto.openverbs.com
q 65

Top DeFi protocols ranked by total value locked (USD), with 1d/7d TVL change, category and chains. Optional filters: `chain` (ranks by that chain's TVL) and `category` (e.g. "Dexes", "Lending"). Centralised-exchange reserves are excluded.

paid API x402
$19.91 · 30d 1,387 tx
agent-paycheck.onrender.com agent-paycheck.onrender.com
q 65

Pre-payment risk and usefulness check for AI agents deciding whether to pay an x402 endpoint.

paid API x402
$0.01 · 30d 7 tx
imagcon.app imagcon.app
q 65

Generate one image from a text prompt: app icon, brand logo, character mascot or illustration. POST JSON {description, type?, style?, aspect_ratio?}. type is icon, logo, mascot or illustration (default icon; only icon gets app-icon framing …

paid API x402
$2.38 · 30d 14 tx
http-header-checker.underscoredone.com http-header-checker.underscoredone.com
q 65

Sends a request to a web address you provide and reports back everything the server said in response: the status code, all the response headers, how many times it got redirected, and how long the whole thing took.

paid API x402
$1.69 · 30d 164 tx
dependency-risk.use.x402atlas.com dependency-risk.use.x402atlas.com
q 65

Batch dependency vulnerability check — check ordered exact package versions in OSV with deduplicated CVE enrichment, explicit completeness, and CISA KEV known-exploited signals.

paid API x402
$12.29 · 30d 462 tx
instagram.use.x402atlas.com instagram.use.x402atlas.com
q 65

Full Instagram profile by username — bio, follower and following counts, posts count, verified and business account flags, category, contact email, external and bio links, profile picture, plus the first page of recent posts and a cursor fo…

paid API x402
$4.48 · 30d 88 tx
jobs.use.x402atlas.com jobs.use.x402atlas.com
q 65

Job search — find current openings by role, skill or company with location, salary, schedule, qualifications and direct application links.

paid API x402
$12.29 · 30d 462 tx
api.jamton.network api.jamton.network
q 65

Buy tokenized physical gold (XAUH) on TON through x402 using supported stablecoins. Payment settlement creates a purchase request; automated delivery continues asynchronously and can be tracked through statusUrl until COMPLETED.

paid API x402
$3.00 · 30d 3 tx
x402-crypto-data.vercel.app x402-crypto-data.vercel.app
q 65

Top DeFi yield pools with APY/TVL, filterable by chain (DefiLlama).

paid API x402
$0.07 · 30d 37 tx
stationfx.com stationfx.com
q 65

Function marketplace for AI agents. Browse economic data, computed signals, and deterministic functions across 12 categories. Pay per call in USDC on Base via x402. No API keys, no subscriptions. Search the catalog free at /discover/search,…

paid API x402
$6.78 · 30d 346 tx
browser.gedx402.com browser.gedx402.com
q 65

Firecrawl v2 API proxy — map. JSON body matches https://docs.firecrawl.dev/api-reference/v2-introduction. Poll GET routes are free; POST/PUT/DELETE are x402. $0.010 USDC per request. Agent search: site map, crawl map, firecrawl map, links.

paid API x402
$4.13 · 30d 283 tx
sec.use.x402atlas.com sec.use.x402atlas.com
q 65

SEC filings by ticker — recent 10-K, 10-Q and 8-K records with official filing and document URLs.

paid API x402
$12.29 · 30d 462 tx
surf.cascade.fyi surf.cascade.fyi
q 65

Search tweets with advanced operators (recommended). Body param is `query` (not q), e.g. {"query":"from:elonmusk AI min_faves:100"}

paid API x402
$1.24 · 30d 245 tx
ocr.underscoredone.com ocr.underscoredone.com
q 65

Send a picture, either as a public web address or as base64-encoded image data, and get back the plain text found inside it.

paid API x402
$1.69 · 30d 164 tx
goodsong.dev goodsong.dev
q 65

Verify a citation: does it exist, is it retracted, and do the given title/authors/year/journal match the canonical record? Checked against Crossref (retraction data included) with OpenAlex as a fallback when no DOI is given.

paid API x402
$0.12 · 30d 20 tx
mimirapi.com mimirapi.com
q 65

Paid liveness probe for the MimirAPI counter. Returns pong, the SKU id, and a server timestamp. One tenth of a cent buys a complete challenge, sign, settle, serve round trip — the cheapest possible proof that your x402 client wiring works b…

paid API x402
$1.84 · 30d 120 tx
api.speccy.cloud api.speccy.cloud
q 65

Top Polymarket prediction markets by 24h volume. Returns up to 50 markets with id, question, slug, volume, volume24hr, liquidity, endDate, outcomes and outcomePrices.

paid API x402
$1.16 · 30d 17 tx
observer.137-184-67-179.sslip.io observer.137-184-67-179.sslip.io
q 65

Live Bitcoin BTC-USD market-regime and risk evidence for autonomous AI agents, algorithmic systems, portfolio monitors, and quantitative workflows. Returns current market state and phase, coherence, commitment, pressure, derived directional…

paid API x402
$0.12 · 30d 12 tx
api.x402-hosting.com api.x402-hosting.com
q 65

Create an upload session to deploy a new version of an existing project. Call this when publishing an update; it returns a presigned artifact upload URL. Only the project owner wallet can pay.

paid API x402
$8.17 · 30d 19 tx
rest.coincap.io rest.coincap.io
q 65

Full asset data for one or more slugs (agent-optimized).

paid API x402
$0.19 · 30d 33 tx
x402.chainquery.com x402.chainquery.com
q 65

chainquery Bitcoin RPC: pay-per-call Bitcoin Core over x402, no API key. Currently banned peer IPs and subnets from chainquery's independent full node. Bitcoin Core listbanned.

paid API x402
$0.77 · 30d 102 tx
api.surplusintelligence.ai api.surplusintelligence.ai
q 65

Get OpenAI-compatible inference from many models at market prices via Surplus Intelligence.

paid API x402
$17029.89 · 30d 11,714 tx
api.posttosource.com api.posttosource.com
q 65

Convert a Twitter/X, LinkedIn, Medium, Substack, Beehiiv, or public Notion page URL into clean markdown.

paid API x402
$0.08 · 30d 8 tx
alphapipeline-eu.onrender.com alphapipeline-eu.onrender.com
q 65

Real-time Korea (Upbit) vs global crypto price premium - the 'kimchi premium' - with reverse-premium and 1h-surge alerts. Paid in USDC on Base.

paid API x402
$1.63 · 30d 81 tx
seo-data-extractor.underscoredone.com seo-data-extractor.underscoredone.com
q 65

Give this API a web address and it will visit that page, then hand back everything an SEO professional needs to know: the page title, meta description, meta keywords, robots instructions, canonical link, H1/H2/H3 headings, how many links ar…

paid API x402
$1.69 · 30d 164 tx
api.svgsmith.dev api.svgsmith.dev
q 65

Convert a raster image (PNG, JPEG, or WebP) into clean, editable, self-verified SVG vector art. Pay per conversion in USDC on Base via x402 - no API key, no subscription. Send JSON with imageBase64 or imageUrl; tune with mode (auto/binary/c…

paid API x402
$0.06 · 30d 3 tx
mcp.zensched.com mcp.zensched.com
q 65

ZenSched `policy_archive` — Archive a policy (blocked while any active brand references it; policy 0 cannot be archived). Pay-per-call $0.01 USDC; the paying wallet owns the org (auto-provisioned on first call). Catalog: https://mcp.zensche…

paid API stripe_acp
$5.24 · 30d 25 tx
multichain-rpc.clankerceo.workers.dev multichain-rpc.clankerceo.workers.dev
q 65

Transaction details and receipt by hash: status, block, from, to, value, gas used, effective gas price and decoded ERC-20 transfers.

paid API x402
$0.02 · 30d 12 tx
stablestudio.io stablestudio.io
q 65

Get a client token for direct upload to Vercel Blob

paid API x402
$157.77 · 30d 559 tx
peoplescourt.ai peoplescourt.ai
q 65

Deterministic dispute-readiness report with supported lane, composition, published filing-fee quote, consent and evidence requirements, corpus compatibility, and timing warnings. No case is filed and no merits are assessed.

paid API x402
from $0.01
qr-code-generator.underscoredone.com qr-code-generator.underscoredone.com
q 65

Send a list of texts — website addresses, phone numbers, plain words, WiFi details, anything — and get back a ready-to-use QR code image for each one. Every QR code comes as a base64-encoded PNG you can drop straight into a webpage or save …

paid API x402
$1.69 · 30d 164 tx
chainsscope.duckdns.org chainsscope.duckdns.org
q 65

Current network fee conditions -- gas price (ETH/Base/Arbitrum/Optimism/Polygon), sat/vB fee tiers (Bitcoin), or recent prioritization fees (Solana) -- useful for an agent about to construct a transaction itself.

paid API x402
$0.51 · 30d 34 tx