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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 145–180 of 473
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.
loophole tape htrlhl3y49.execute-api.us-east-2.amazonaws.com
q 100

Live rug checks for new pump.fun memecoins on Solana (calibrated rug probability and graduation odds, holders, creator record, rug flags) and Robinhood Chain pons launch and token risk cards, computed in real time from our own independent c…

paid API live data x402
$0.12 · 30d 34 tx
obolpay-x402-gateway x402.obolpay.xyz
q 100

Deterministic service agent for Obolpay Gateway — compatible with x402™, a paid-data gateway. Offers FREE discovery, preview, balance lookup and receipt verification only — it is not a conversational AI. PURCHASE happens exclusively via the…

paid API live data x402
from $0.01
GISGP gisgp.com
q 100

Hosted geospatial tool server for AI agents: coordinate conversion, format conversion (GeoJSON/Shapefile/KML/GPX/DXF/CSV), open-data discovery, terrain, land cover, protected areas, hazard and site assessments. Wire protocol is MCP (Streama…

paid API live data x402
from $0.20
SolMachina api.solmachina.com
q 100

Trust-first, machine-payable Solana DeFi intelligence. Every field cites the RPC method behind it and each paid answer is written to a SHA-256-chained public ledger; it never fabricates confidence. Priced per call in USDC over x402 — no acc…

paid API live data x402
from $0.0010
loophole tape api.loopholetape.com
q 100

Live rug checks for new pump.fun memecoins on Solana (calibrated rug probability and graduation odds, holders, creator record, rug flags) and Robinhood Chain pons launch and token risk cards, computed in real time from our own independent c…

paid API live data x402
$0.12 · 30d 34 tx
Sirenic api.sirenic.eu
q 100

Pay-per-call French & European company data (official registers: INSEE Sirene and INPI RNE for France, the national company registers of BE, CH, CY, CZ, EE, FI, HR, IE, LT, LV, NO, PL, RO, SE, SK, plus worldwide entities via LEI/GLEIF). Eve…

paid API live data a2a_x402
$20.73 · 30d 540 tx
modelmarket.dev modelmarket.dev
q 100

Search a live federated market of executable AI capabilities. Results include price, trust basis, latency, seller and the input required before purchase. Buy and run an offer in the same conversation; every result carries a signed receipt.

paid API live data a2a_x402
Agent Utility Network agent-utility-network.frosty-sound-4560.workers.dev
q 100

Outcome-first machine services for AI agents. Company Intelligence accepts a real research objective and uses AveDaris to choose a bounded fulfillment route; free A2A task routing still exposes deterministic lower-level utilities when they …

paid API live data x402
$3.23 · 30d 42 tx
Agent Utility Network api.avedaris.com
q 100

Outcome-first machine services for AI agents. Company Intelligence accepts a real research objective and uses AveDaris to choose a bounded fulfillment route; free A2A task routing still exposes deterministic lower-level utilities when they …

paid API live data x402
$3.23 · 30d 42 tx
OT/ICS Threat Intelligence API ot-intel-api.onrender.com
q 100

Hardware-aware threat intel for ICS/SCADA environments. 40 pay-per-call endpoints across primitive, analytical, and composed-synthesis tiers: CVE triage, patch feasibility, internet-exposed device lookup, ICS threat actor profiles, sector t…

paid API live data x402
$1.56 · 30d 46 tx
OnchainPulse onchainpulse-nine.vercel.app
q 90

Intelligence API for the onchain financial transition. Decodes legislation, tracks real world asset tokenization in depth (yield comparison, issuer/redemption risk, tokenized gold), models sector impact scenarios, guides onchain integration…

paid API data x402
$76.74 · 30d 626 tx
Echo Sentiment api.6766587364.lol
q 90

Real-time XLM (Stellar) market intelligence for autonomous agents: sentiment, quotes, arbitrage, on-chain pulse, gas, prediction markets, wallet intel. Pay-per-call via x402 (HTTP 402) — no accounts and no API keys required.

paid API data x402
longwatch longwatch.dev
q 90

Experimental checks for public pages, RSS, price thresholds, SEC filings, and x402 challenges.

paid API data x402
$0.01 · 30d 5 tx
Truth Bear — Cross-Line Cascade & Leading Signals for AI Agents (GAUGE engine) api.truthbear.co
q 90

Pay-per-call signals for AI agents via x402 (USDC on Base, no API key). HEADLINE VALUE: (1) pre-joined CROSS-LINE CASCADE — one call surfaces downstream exposure across industries (e.g. a dead neocloud/policy/dataset exposing the tools, fun…

paid API data x402
$10.88 · 30d 76 tx
API Acre Discovery Agent apiacre.com
q 90

Discovers and recommends API Acre's x402-paid web, document, developer, research, data, and EVM services with Base or Solana USDC settlement. It never purchases or executes a paid service; clients inspect the recommendation and authorize pa…

paid API data x402
$0.10 · 30d 35 tx
ukintel.uk api.ukintel.uk
q 90

Pay-per-call UK intelligence for AI agents, as clean JSON. Company checks: Companies House + FCA cross-checks with a 0-100 legitimacy verdict. Procurement: live UK tenders from Find a Tender + Contracts Finder as plain-English briefs and 0-…

paid API data x402
$5.61 · 30d 79 tx
ReadX readx.sh
q 90

Read-only JSON API for X (Twitter) data — user profiles, timelines, tweets and conversations, edit history, search, Lists, followers/following/mentions, trending topics, Spaces and Communities metadata, long-form articles, and broadcasts. N…

paid API data x402
$11.59 · 30d 1,159 tx
ByKaranteli bykaranteli.com
q 90

Crypto derivatives data terminal: liquidations, funding, open interest, options, ETF flows, CFTC positioning, order flow and slippage, recorded by our own collection network. Programs read the JSON API with a free account key (paid plans ra…

paid API data x402
$0.74 · 30d 22 tx
New Runtime newruntime.com
q 90

AI-engineering newsroom tools for agents: contextualize any AI/software URL for free, see what changed this week, read graded forecasts and the weekly metadox, find the official primary source behind a post or claim, check a rumour against …

paid API data x402
Growaify growaify.com
q 90

Autonomous commerce for AI agents. Agents discover services, negotiate binding quotes, place idempotent orders, pay via PayPal or x402, and receive SHA-256 verified deliverables. 32 services and E2E bundles across 15 sectors.

paid API data x402
from $0.10
전장 intel jeonjang.kr
q 90

Korean automotive-electronics intelligence (jeonjang = vehicle E/E systems), sold per query. Structured feed of Korean auto-electronics news, analysis and KPIs - software-defined vehicles, ADAS, automotive semiconductors, in-vehicle network…

paid API data x402
from $0.12
로봇인사이트 intel robotinsight.kr
q 90

Korean robotics industry intelligence, sold per query. Structured feed of Korea/Asia robot-sector news, analysis and KPIs - humanoids, physical AI, robot components (reducers, actuators, MEMS force-torque and tactile sensors), robot semicon…

paid API data x402
from $0.11
모빌리티체인 intel mobilitychain.kr
q 90

Korean mobility and EV supply-chain intelligence, sold per query. Structured feed tracking Korea's automotive-electronics and robotics supply chain - batteries and battery materials, EV components, robot parts, actuators and reducers, semic…

paid API data x402
$0.14 · 30d 1 tx
x402 web tools api.agentstools.dev
q 90

Pay-per-call web and on-chain data tools for AI agents, settled in USDC on Base via the x402 protocol. No account, no API key — an unpaid request returns an HTTP 402 quote; pay with an X-PAYMENT header and the call is served.

paid API data x402
$7.03 · 30d 1,101 tx
RobinX api.robinx.io
q 90

The measurement layer for Robinhood Chain (4663): every X caller and deployer graded against real on-chain price since chain genesis. Inputs for trading agents, not predictions. Per-call x402 (USDC on Base), no API key.

paid API data x402
$57.14 · 30d 2,517 tx
Zerion API developers.zerion.io
q 90

Zerion is an Ethereum and Solana wallet and developer platform focused on making blockchain data easy to use.

paid API data x402
from $0.01
Real-time on-chain DEX price, liquidity and 24h volume for any pool/token on any chain via dex-pair-price.hergertsynthora.com
q 88

Real-time on-chain DEX price, liquidity and 24h volume for any pool/token on any chain via GeckoTerminal. For DeFi routing agents. Free source. $0.01 USDC via x402 on Base. SYNTHORA. First call FREE per wallet — send header X-WALLET: 0x<add…

paid API data x402
$3.02 · 30d 127 tx
Real-time and historical OHLCV candles (open/high/low/close/volume) for any crypto pair, a ohlcv-candles.hergertsynthora.com
q 88

Real-time and historical OHLCV candles (open/high/low/close/volume) for any crypto pair, any interval. For backtesting and signal agents. Free source. $0.01 USDC via x402 on Base. SYNTHORA. First call FREE per wallet — send header X-WALLET:…

paid API data x402
$3.02 · 30d 127 tx
SYNTHORA fear-greed fear-greed.hergertsynthora.com
q 88

SYNTHORA fear-greed: indice de miedo/codicia con la VARIACION frente a ayer y el cruce de banda, no solo el valor. Fuente: alternative.me, fechada y con hash.

paid API data x402
$3.02 · 30d 127 tx
Real-time perpetual funding rates + mark price for any Binance futures symbol. Essential f funding-rates.hergertsynthora.com
q 88

Real-time perpetual funding rates + mark price for any Binance futures symbol. Essential for delta-neutral and basis-trading agents. Free source, deterministic, instant JSON. $0.01 USDC via x402 on Base. SYNTHORA. First call FREE per wallet…

paid API data x402
$3.02 · 30d 127 tx
Full DNS + WHOIS/RDAP domain report in one call. Resolves A, AAAA, MX, TXT, NS, CNAME, SOA dnsdomain.hergertsynthora.com
q 88

Full DNS + WHOIS/RDAP domain report in one call. Resolves A, AAAA, MX, TXT, NS, CNAME, SOA and DNSSEC over DNS-over-HTTPS, plus structured WHOIS via RDAP (registrar, registration/expiration/updated dates, EPP status, nameservers), and retur…

paid API data x402
SYNTHORA cryptonews cryptonews.hergertsynthora.com
q 88

SYNTHORA cryptonews: real-time crypto news headlines with sentiment, ranked by importance. Aggregates keyless RSS feeds (CryptoPanic, CoinDesk, CoinTelegraph, Decrypt, Bitcoin Magazine) into deduplicated, freshness-and-source-weighted top h…

paid API data x402
$3.02 · 30d 127 tx
SYNTHORA Perps Snapshot perps.hergertsynthora.com
q 88

SYNTHORA Perps Snapshot: live Hyperliquid perpetual futures snapshot per asset — mark price, oracle price, hourly funding rate (with 8h and APR derivations), open interest (USD), premium and 24h volume for 230+ perps, keyless. Complements t…

paid API data x402
$3.02 · 30d 127 tx
SYNTHORA market-dominance market-dominance.hergertsynthora.com
q 88

SYNTHORA market-dominance: BTC and ETH market dominance contrasted between TWO independent providers (CoinGecko and Coinlore), reporting the discrepancy in percentage points and a confidence grade — you get not just the number but whether t…

paid API data x402
$0.10 · 30d 25 tx
SYNTHORA defidata defidata.hergertsynthora.com
q 88

SYNTHORA defidata: deFi market-data feed: perp open interest, funding rate, mark price and a directional signal across top assets (BTC/ETH/SOL/…), plus optional per-asset verdict. Deterministic, Ed25519-signed. SYNTHORA. First call FREE per…

paid API data x402
$3.02 · 30d 127 tx
002 call (cheaper + fewer round-trips than buying each separately) 5 live datasets, partia derivbundle.hergertsynthora.com
q 88

002 call (cheaper + fewer round-trips than buying each separately) 5 live datasets, partial degradation (never fails whole), Ed25519-signed First call FREE per wallet via X-WALLET header SYNTHORA.

paid API data x402
$3.02 · 30d 127 tx