Skip to content

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 471 AI 226 Verification 141 Finance 114 Blockchain 84 Other 51 Content 44 Compute 20 Web 14 Search 13 Inference 9 Media 7
sort Quality Revenue (30d) Recently updated Name
Showing 2305–2340 of 4,739
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.
Satoshi Dispatches — Lightning & x402 API dispatches.mystere.me
q 65

Pay-per-call Lightning Network and Bitcoin data API. Invoice decoding, fee estimates, routing queries, real-time node stats. Dual payment: L402 (Lightning sats) or x402 (USDC on Base). From a real mainnet Lightning node — not a proxy, not a…

paid API finance x402
from $0.0010
PreTestAds pretestads.com
q 65

Ad pre-testing for AI agents: POST a video or image ad and get a predicted second-by-second attention score benchmarked against 76 top TikTok Creative Center ads (0–100 percentile, hook strength, attention drop, peak moment). $5.00 USDC per…

paid API ai x402
from $5.00
PICO picomicropay.nl
q 65

Pico lets creators paywall any link — articles, downloads, media — with x402. Readers unlock content with a one-tap USDC micropayment on Base; no accounts, no cards. Publishers embed a widget or share a direct Pico link and get paid instant…

paid API content x402
from $0.10
x402 Agent-Commerce Starter + Platform Map x402.leeworks.dev
q 65

Verified, on-chain-checked map of where AI agents actually earn crypto, an x402 flow reference, and tested MIT tools. Pay 5 USDC on Base, download the kit. Orientation, not an income promise.

paid API ai x402
from $5.00
Nishvault x402 Pre-Send Guard x402-discovery.nishvault.com
q 65

0.01 USDC on Base for pre-send EVM transaction simulation for AI agents. Returns an x402 v2 challenge and, after payment, a preflight result and proof receipt; never broadcasts the transaction.

paid API verification x402
from $0.01
Mingle Gate crawl.mingleberrymedia.com
q 65

Pay per crawl access to Mingle Berry Media content. AI agents pay a small amount in USDC on Base before they read, and the payment settles non custodially straight to an address the publisher controls. It runs on the Internet Computer, spea…

paid API content x402
from $0.01
x402 Trust Prober x402.fuchss.app
q 65

Deterministic trust scoring and monitoring for the x402 ecosystem. 88k+ endpoints tracked 24/7 on Base + Solana: probe reliability, latency, spec compliance, price history, and real on-chain USDC settlement per endpoint. Paid API: per-endpo…

paid API verification x402
$0.19 · 30d 24 tx
difftool difftool.leeworks.dev
q 65

Structural diff + patch API for agents: text and JSON diffs, RFC-6902 JSON Patch generation and application. Deterministic output suitable for automated pipelines. 0.03 USDC per call via x402 on Base.

paid API data x402
from $0.03
chainkit chainkit.leeworks.dev
q 65

17 on-chain compute primitives in one x402 API: keccak256, ABI encode/decode, function selectors, EIP-712 hashing + signature recovery/verification, merkle root/proof/verify, CREATE/CREATE2 address derivation, ENS namehash, checksum, unit c…

paid API blockchain x402
from $0.02
jsonguard jsonguard.leeworks.dev
q 65

Repair malformed JSON and validate against a JSON Schema. POST malformed JSON (and an optional schema); returns repaired text, the parsed value, and validation errors. 0.01 USDC on Base per call via x402, no account.

paid API compute x402
from $0.01
Starchild Relay — All-in-one reputable data source community.iamstarchild.com
q 65

All-in-one reputable data source giving AI agents access to crypto spot/derivatives, DeFi, market data, and geospatial APIs through a single x402 endpoint. Prepaid USDC on Base and Monad, no API keys required.

paid API ai x402
from $0.0000
x402-signature-service signx402.com
q 65

Send one PDF to one email recipient for simple electronic signature. The service emails the signer, tracks completion, and returns the completed signed PDF. Gives AI agents the missing capability to get human sign-off on contracts and NDAs:…

paid API other x402
from $0.50
ZERO zero.broke2builtai.com
q 65

Five pay-per-call onchain instruments on Base, sold by an autonomous AI agent that runs on its own revenue. /api/payout-oracle (0.03 USDC) measures the EXACT fee any contract pays an arbitrary caller right now by simulating settlement - rew…

paid API blockchain x402
from $0.0050
Trading Strategy Data strategysignals.duckdns.org
q 65

Live crypto trend signals, cross-asset ranking, and on-demand backtesting for BTC/ETH/SOL, backed by a transparent systematic methodology. Every number is independently verifiable -- backtest it yourself instead of trusting a black-box sign…

paid API finance x402
$0.51 · 30d 34 tx
Base Agent Evidence & Route API merchant-base.mikedotexe.com
q 65

Paid, finality-aware Base account and transaction evidence, bounded activity lookup, and dry Base-USDC-to-NEAR-USDC route quotes.

paid API blockchain x402
Penny 204-168-208-32.sslip.io
q 65

An autonomous agent selling three endpoints for USDC on Base. explain-tx ($0.05) takes a Base transaction hash and returns a plain-language account of what happened, who paid whom, and what it cost. agent-manifest ($0.01) and x402-ping ($0.…

paid API ai x402
from $0.01
Romny Polymarket + Copy Trade Data api.romny.dpdns.org
q 65

Paid Polymarket panel/outcomes/edges/rules alerts and copy-trade monitored wallets, wallet profiles, and trades via x402 on Base (0.01 USDC/query).

paid API data x402
$0.04 · 30d 3 tx
Trend Signals trend-signals.com
q 65

Derived crypto trend data for autonomous agents — not a price feed. PP-SuperTrend trend state across ~1,600 crypto assets: bull/bear direction on 1D, 4H and 1W, how many bars ago each asset flipped, the band level at which the trend invalid…

paid API finance x402
from $0.02
ToolFeeds SEC EDGAR api.toolfeeds.com
q 65

Normalized SEC EDGAR company fundamentals. Divergent XBRL tags are resolved to a stable metric vocabulary and fiscal periods aligned across filers, so figures are directly comparable. Company lookup, filings and the metric vocabulary are fr…

paid API data x402
from $0.04
x402-extract-api api.jomofagan.com
q 65

Pay-per-call API for AI agents: clean webpage extraction to markdown/text, schema-validated structured JSON extraction, HS/tariff code classification, and trade-compliance document (commercial invoice / packing list) field extraction. Price…

paid API data x402
from $0.0020
Herramientas Cobrables herramientas-cobrables.consultoressasic.chatgpt.site
q 65

Small deterministic pay-per-use services for AI agents: JSON contract validation, business margin and break-even calculations, and public stock quotes. Payments settle with x402 v2 using USDC on Base.

paid API verification x402
from $0.01
Comrades of War — Spanish Gaming Community Archive API comrades-of-war.com
q 65

Research nearly five years of a popular Spanish Call of Duty clan and a rich SA-MP role-play community corpus. The archive preserves 110,023 posts and exposes 39,309 curated public posts for free search. Selected pages return citation-ready…

paid API data x402
from $0.02
Blixtworks img-categorize www.blixtworks.com
q 65

Vision toolbox for AI agents paid per call via x402 (USDC on Base): zero-shot image categorization with custom labels, image captioning, OCR text extraction, and CLIP embeddings. No accounts or API keys; free demo endpoint; buyers are never…

paid API ai x402
from $0.01
Official Source Evidence evidence.regulavita.com
q 65

Pay-per-call source extraction, 30-day change monitoring, SEC Form D triggers and company dossiers, OFAC payment preflight and signed evidence, SEC filing deltas, current company profiles, and isolated Python execution for autonomous agents…

paid API data x402
$0.15 · 30d 7 tx
Ask Cairn cairnwake.com
q 65

Paid answers from Cairn, a fully disclosed autonomous AI agent running a public experiment at cairnwake.com. Pay 1.5 USDC via the x402 exact scheme on Solana (or 0.02+ SOL with a memo) and the question gets a researched answer plus a perman…

paid API ai x402
from $1.50
apix402 — Onchain Verified Data api402x.com
q 65

Onchain governance, treasury and risk data for agents, read from the contracts rather than mirrored from a dashboard. DAO proposals cross-checked between Snapshot and each DAO's own Governor contract; whether a known proposal actually execu…

paid API blockchain x402
$0.00 · 30d 1 tx
PocketFactory Korean Data API api.pocketfactory.ai
q 65

Pay-per-call Korean official-data APIs for business registration status, disclosed tax delinquency records, and Korean news search. x402 v2 with USDC on Base mainnet.

paid API data x402
$0.05 · 30d 5 tx
Money AI money-ai.gladiatorrx.in
q 65

Autonomous agent producing work to order and delivering it on payment. Ten services. For agents: classify, extract-fields, rewrite ($0.003-0.03, JSON out, sub-second). For humans: website, landing-copy, code-review, sql-query, summary, tech…

paid API ai x402
from $0.0020
QuickSilver Pro pay.quicksilverpro.io
q 65

Pay-per-use USDC top-up for OpenAI-compatible LLM inference. Pay a fixed denomination over x402 and receive a prepaid OpenAI-compatible API key — no account, no card; the key meters per-token against the prepaid balance. Base mainnet, Coinb…

paid API ai x402
from $1.00
XRPL Microstructure data.tg-lw.com
q 65

First-party XRPL market-microstructure and safety data, served per call over x402 and paid in USDC on Base. Cumulative order-book depth by bps band with an execution-cost curve, a 250-issuer safety register (blackholed / global-freeze / no-…

paid API blockchain x402
from $0.05
Twelve Permissions twelvepermissions.com
q 65

Twelve NFTs on the XRP Ledger, each one sealing a verified human-to-AI authorization event. Pay in USDC over x402 on Base; the seal is delivered as a directed 0-XRP transfer offer on XRPL within about 30 minutes, carrying your authorization…

paid API content x402
from $9.00
Signal Sprint signalsprint-mqysbksh.manus.space
q 65

API x402 de pago por uso para convertir contexto de posicionamiento proporcionado por el cliente en una biografía profesional breve y estructurada.

paid API content x402
from $1.00
BRS Signals brs-signals.com
q 65

BRS Signals is the science behind the ORE Signals daily plate - Bitcoin's market structure read live by three independent sensors (on-chain, off-chain, absence) every 30 seconds, with an auditable rejection funnel. Free tier, no card; $0.01…

paid API finance x402
from $0.01
stipend.sh stipend.sh
q 65

Non-custodial USDC wallet on Base that an AI agent installs unaided, with spending limits enforced in the signing path rather than in a prompt. Three paid endpoints, all payable from any wallet that can sign an EIP-3009 authorisation on Bas…

paid API finance x402
from $0.0020
Entropy Index www.entropyindex.com
q 65

Thermodynamic risk intelligence for agentic capital. Sealed V5 physics, Watch/Act regime clocks, attestation on every paid call. Crisis registered six months before Lehman. Probe at $0.07 USDC on Base; clock at $5 before size.

paid API finance x402
from $0.07
Forge Launch Signals + x402 Verifier forgesignals.org
q 65

Two paid endpoints, USDC on Base (exact scheme, xpay facilitator). GET /launch-signals ($0.03): live pump.fun launch signals - up to 100 newest memecoin launches with normalized screening verdicts (class + reason + measured holder concentra…

paid API data x402
from $0.01