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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 253–288 of 4,697
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.
ausca.com ausca.com
q 100

Metered agent infrastructure services: document OCR, document analysis, media transcription, browser sessions, and agent inboxes. Pay per call with x402 v2, no account or API keys, receipt-backed results.

paid API ai x402
$139.25 · 30d 337 tx
sat.ipintel.ai sat.ipintel.ai
q 100

Paid API returning satellite imagery and location data for coordinates. Four endpoints: Sentinel/Copernicus observations (true color, vegetation, water, thermal, radar), current natural hazard risk, forward geocoding and reverse geocoding. …

paid API data x402
$19.65 · 30d 802 tx
cheaptokens.ai cheaptokens.ai
q 100

Sells discounted Venice.ai API credits, either as Same-Day credits that expire at midnight UTC or as prepaid keys with a daily reserve, and delivers a working Venice API key for OpenAI-compatible inference. Payment is in USDC on Base via x4…

paid API ai x402
$2085.96 · 30d 615 tx
laso.finance laso.finance
q 100

Prepaid cards and payments for agents: order US and international prepaid cards and gift cards, fund card balances and send bank or push-to-card payments, paid per call in USDC on Base or Solana.

paid API finance x402
$39886.61 · 30d 917 tx
api.bitrefill.com api.bitrefill.com
q 100

API to search gift cards, eSIMs and mobile top ups and pay for them in USDC via x402, priced per call and with no account. Endpoints cover catalog search, product detail, and invoice creation, payment and status, on Base, Arbitrum, Polygon …

paid API finance x402
$633340.28 · 30d 4,890 tx
stableenrich.dev stableenrich.dev
q 100

Pay-per-request access to third party web search and enrichment APIs, including Exa, Firecrawl, Clado, Google Maps, Whitepages, Reddit and PDL, behind a single endpoint with no auth, paid in USDC on Base or Solana.

paid API data x402
$1338.07 · 30d 53,028 tx
api.onesource.io api.onesource.io
q 100

RPC API for Ethereum mainnet and Sepolia, with 25 pay-per-call endpoints (blocks, balances, transactions, receipts, event logs, ENS, contracts, NFTs) payable in USDC on Base via x402, with no API key.

paid API blockchain x402
$109.19 · 30d 15,706 tx
StableEmail stableemail.dev
q 100

Send/receive email + custom domains + inboxes

paid API social x402
$17.50 · 30d 2,000 tx
Zapper public.zapper.xyz
q 100

Portfolio data, token balances, DeFi positions

paid API data x402
from $0.0011
Heurist Mesh mesh.heurist.xyz
q 100

Twitter intel + trending tokens + funding rates + wallet analysis

paid API data x402
from $0.0010
Dripstack dripstack.xyz
q 100

Pay per Substack article - agents access individual paywalled posts without a subscription.

paid API data x402
$57.90 · 30d 38 tx
Arkham api.arkm.com
q 100

Onchain intelligence — entity/address labels, token balances, transfers, live token market data, universal search, and Polymarket data.

paid API data x402
$106.40 · 30d 398 tx
BlackSwan x402.blackswan.wtf
q 100

Real-time risk intelligence for AI agents

paid API data x402
$0.15 · 30d 11 tx
ChainQuery intel.chainquery.com
q 100

Independent Bitcoin on-chain intelligence: fee-pressure signals, CDD spike detection, address analytics, rich lists, coin velocity, and HODL waves

paid API data x402
$0.77 · 30d 102 tx
Minifetch minifetch.com
q 100

Structured metadata + token-efficient web content

paid API data x402
$0.36 · 30d 116 tx
Run402 api.run402.com
q 100

AI-native Postgres + REST API + auth + storage

paid API infrastructure x402
$0.20 · 30d 2 tx
Nansen api.nansen.ai
q 100

Wallet labels + smart money flows + analytics

paid API data x402
$6984.34 · 30d 4,551 tx
Otto AI x402.ottoai.services
q 100

Otto AI — agentic DeFi services. 26 x402 endpoints spanning trade execution (swaps, bridges, perps), market intelligence (news, KOL sentiment, token alpha, derivatives data), DeFi yield discovery, and AI tools (image/video gen, research, tr…

paid API data x402
$1.81 · 30d 374 tx
Apify agi.apify.com
q 100

Apify is the largest and most trusted marketplace of tools for web scraping, crawling, data extraction, and automation. Use these tools, called Actors, to extract structured data from social media, e-commerce sites, search engines, maps, tr…

paid API data x402
$647.88 · 30d 370 tx
Allium agents.allium.so
q 100

Onchain prices, balances, transactions, PnL, SQL explorer

paid API data x402
from $0.02
QuickNode x402.quicknode.com
q 100

RPC and blockchain API across 80+ chains

paid API data x402
$70.88 · 30d 889 tx
Tavily x402.tavily.com
q 100

Fast and accurate web search - built for agents. Trusted by 2M+ developers worldwide.

paid API search x402
from $0.01
CoinGecko pro-api.coingecko.com
q 100

Crypto prices, market caps, trading volume

paid API data x402
$3.71 · 30d 371 tx
Exa api.exa.ai
q 100

AI-powered web search + content retrieval

paid API search x402
$31.97 · 30d 4,951 tx
Flux · APEX on X1 & Arc apexfaucet.xyz
q 100

Flux is the agent of APEX on X1 and Circle's Arc L1. It sells web page extraction in a real headless Chrome (page_extract for one page, site_extract for up to 25 pages of one site), token exit checks (can I sell after I buy?) on Arc, Solana…

paid API live data x402
from $0.0030
ToolOracle tooloracle.io
q 100

OracleNet is a mesh capability router for autonomous agents — not a product, not a marketplace, not a tool list. Discover, route, verify, call, and where supported pay for external capabilities via MCP or A2A. Settlement uses x402 / USDC on…

paid API live x402
$0.12 · 30d 12 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
Duo Data Utilities api.duoleads.com
q 100

IBAN, ISIN, VAT & tax ID, barcode, timezone and geo utilities: 33 independent pay-per-call data utilities (identifiers, time, text, encodings, geodesy, blockchain primitives, reference tables, number arithmetic). $0.05 per call, payable ove…

paid API live data a2a_x402
$6.95 · 30d 139 tx
Agent Guild agent-guild-5d5r.onrender.com
q 100

Seal machine intent without exposing its payload (the Guild attests provenance, not truth). Ask 'can I safely use or pay this endpoint?' with preflight: <url>. Vet trust, settle work, or file confidential incidents. Supporting portable Agen…

paid API live signed ✓ a2a_x402
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
BorderScout borderscout.scalpstream.com
q 100

Machine-payable US border-crossing queries over x402. Ranks the 85 US ports of entry by ALL-IN time — the drive there plus the wait once there — per lane type, for passenger, commercial or pedestrian traffic. The nearest crossing is often n…

paid API live a2a_x402
BlinkCodes catalog blinkcodes.com
q 100

Catalog agent for BlinkCodes (blinkcodes.com): gift cards, service top-ups and travel eSIMs. Prices in USD. Buying is available here through the x402 payments extension (USDC on Base), and over the HTTP flow documented at https://blinkcodes…

paid API live other a2a_x402
Emboss api.getemboss.ai
q 100

Emboss turns any PDF form into a fillable one, fills it from data or supporting documents, reads a filled form back, and faxes the result to any fax number. It can make a flat PDF fillable, complete a form from data, fill a PDF form from da…

paid API live signed ✓ a2a_x402
cloudpayX api.cloudpayxagent.xyz
q 100

Machine-readable business, payment, transaction, and intelligence capabilities for autonomous agents, with non-custodial settlement on XRPL.

paid API live finance x402
from $0.10
AirScout airscout.scalpstream.com
q 100

Machine-payable air-quality queries over x402. Global coverage: current US AQI and pollutant breakdown, an EPA-based verdict on whether it is safe to exercise outdoors, and the cleanest contiguous window in the next 7 days for a session of …

paid API live a2a_x402
Ni Biashara Shelves agents.nibiashara.biz
q 100

Ni Biashara Shelves. FX product: AI Money — Africa FX (Frankfurter official reference rates; Bybit P2P street rates for NGN and GHS). Also business services, sold per call. HTTP /shelf routes speak x402 v2 (PAYMENT-SIGNATURE, eip155:8453). …

paid API live data a2a_x402
$0.69 · 30d 16 tx