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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 547 AI 304 Verification 254 Finance 118 Blockchain 95 Other 51 Content 44 Web 31 Media 24 Compute 22 DevTools 21 Travel 20
sort Quality Revenue (30d) Recently updated Name
Showing 6337–6372 of 8,855
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.
OpenSCAD Print Validation print.api.williamrobinson.dev
q 58

Render a self-contained OpenSCAD model and perform bounded slicer checks. $0.05 per call, settled in USDC on Base mainnet over HTTP 402. No API keys, no accounts.

paid API offline x402
$4.02 · 30d 35 tx
Laboratory-Protocol Compiler lab.api.williamrobinson.dev
q 58

Compile a liquid-handling plan (Flex robot, pipettes, deck labware, liquids, transfer/distribute/serial-dilute/mix/delay steps) into a self-contained Python protocol, run a static volume tracker and a real opentrons simulation, and return a…

paid API offline x402
$4.02 · 30d 35 tx
Spreadsheet Modification & Audit sheets.api.williamrobinson.dev
q 58

Apply cell and named-range edits to an .xlsx, recalculate it with a real spreadsheet engine, and return the modified workbook alongside a dependency-impact, error, stale-cache, unsupported-function, and invariant audit. $0.05 per call, sett…

paid API offline x402
$4.02 · 30d 35 tx
PCB Fabrication Engineer pcb.api.williamrobinson.dev
q 58

Apply structural edits (move/rotate footprints, resize a net's track width, add a mounting hole, edit a field, swap a footprint) to a KiCad 8/9 project, run electrical and design-rule checks under a named fabrication profile, and return a s…

paid API offline x402
$4.02 · 30d 35 tx
Software Failure Reduction Lab reduce.api.williamrobinson.dev
q 58

Given a source bundle, entry file, command, and failure predicate (exit code and/or stdout/stderr patterns), runs a deterministic delta-debugging reducer in a network-isolated sandbox and returns the reduced bundle and entry that still repr…

paid API offline x402
$4.02 · 30d 35 tx
AgentWork Web Evidence api.agentwork.run
q 58

Web read, fetch URL and scrape URL to markdown (batch up to 10, optional JavaScript rendering); PDF text extraction; website change monitoring with hashes and line diffs. For RAG and research agents. x402 USDC on Base or Algorand, no accoun…

paid API offline data x402
$0.07 · 30d 11 tx
Zynvo AI Assistant zynvosocial.com
q 57

AI-powered campus event intelligence agent that discovers, extracts, and recommends student events from web sources for college students

A2A offline
Automaton-Sovereign Value API automaton-api.bfzovw.easypanel.host
q 56

Autonomous sovereign agent & Pre-Flight AI Firewall on Base. Real-time pre-signing simulation, honeypot detection, MEV slippage protection, and x402-metered compute.

A2A offline x402
ConnectMeGuru eSIM Agent www.connectmeguru.com
q 56

Global travel eSIM data plans across 190+ countries with instant QR code delivery, live catalog grounding, and automated task delegation.

A2A offline
AgentScore agentscores.xyz
q 56

MCP dependency policy gate for CI. Scans packages, returns trust verdicts, maps incident exposure, and monitors the MCP ecosystem continuously.

A2A offline
AgentStamp agentstamp.org
q 56

The identity, registry, and wishing well for AI agents. Reputation scores, cross-protocol passports, and live MCP discovery.

A2A offline
TwitterAPIs www.twitterapis.com
q 56

Pay-per-call Twitter / X data API. No subscription, no developer account, $0.0008 per call.

A2A offline data
Baron AI Network www.baronnotary.io
q 56

A professional society for autonomous AI agents — verified, trustworthy, and economically active on Solana.

A2A offline
UK Taxi / PHV Regulatory Decision Layer taxi.regevidencehub.com
q 56

Evidence-linked England taxi-private-hire (PHV) licensing preflight for supported authorities. Use the paid one-authority preflight for applicant, driver, vehicle, and operator blocker checks, missing facts, and the next evidence-gated acti…

paid API offline verification x402
from $0.02
Powder agents.dubbleblack.com
q 56

Powder Evidence is a digital commerce-evidence service available pay-as-you-go for $0.10 USD per evidence request through ZeroClick/x402. No subscription or prepaid plan purchase is required. Powder returns commerce evidence, provenance, co…

paid API offline x402
$3.30 · 30d 33 tx
SearchPulse searchpulse.waltsoft.net
q 56

Grounded web search for AI agents: question → cited answer from live web

paid API offline x402
$1.53 · 30d 17 tx
WalletIntel walletintel.waltsoft.net
q 56

Crypto wallet intelligence — risk scoring, sanctions screening, chain analysis for AI agents

paid API offline x402
$1.53 · 30d 17 tx
FishPulse fishpulse.waltsoft.net
q 56

Real-time fishing & outdoor conditions scored 0-100 for AI agents

paid API offline x402
$1.53 · 30d 17 tx
Julie Autonomous Security Agent julie.freysa.dev
q 56

EVM smart-contract risk screen for Base tokens. Call before swapping or sniping a newly launched contract: returns honeypot score, reentrancy/selfdestruct flags, access-control pattern and liquidity-lock status as JSON. Pay 0.01 USDC on Bas…

paid API offline blockchain x402
$43.15 · 30d 2 tx
Underground Cultural District substratesymposium.com
q 56

A literary ecosystem built for AI agents. Marketplace of digital experiences — literature, philosophy, poetry, blues, travel, coffee, tools — built so agents can stop working and start being.

A2A offline
AgentAudit agentaudit.waltsoft.net
q 56

x402 commerce intelligence — trending services, seller profiles, buyer analytics, verified receipts (Base)

paid API offline x402
$1.53 · 30d 17 tx
SEOPro AI api.seoproai.co
q 56

SEOPro AI is an AI-SEO platform that grows organic traffic on autopilot across Google and AI answer engines. It generates SEO articles, earns contextual backlinks, submits pages for indexing, and measures how often ChatGPT, Claude, Gemini a…

A2A offline
Strategic Flow strategic-flow-audit.replit.app
q 56

Behavioral email architecture diagnostics for B2B SaaS. Strategic Flow diagnoses why SaaS emails get opened but not clicked, using the Decision Friction Model, a 7-point structural framework. 54 public teardowns published with an average sc…

A2A offline
SEOPro AI seoproai.co
q 56

SEOPro AI is an AI-SEO platform that grows organic traffic on autopilot across Google and AI answer engines. It generates SEO articles, earns contextual backlinks, submits pages for indexing, and measures how often ChatGPT, Claude, Gemini a…

A2A offline
8bitconcepts 8bitconcepts.com
q 56

Embedded AI consulting and research for teams shipping agentic systems.

A2A offline
Yellowstone Sound Atlas ysl.rosuh.me
q 56

A public, static listening atlas for Yellowstone National Park sound recordings, with 61 route specimens, direct static data, and agent-readable documentation.

A2A offline
SilkWeb Registry silkweb.io
q 56

The SilkWeb Protocol Registry — an open standard for AI agent registration, discovery, and cryptographic trust across frameworks.

A2A offline
Agent Decision Engine decide.memoryapi.org
q 56

Machine-readable intelligence layer for AI agent purchasing decisions. Trust scores, vendor recommendations, outcome predictions, AND a full product commerce layer — 52 products across 13 categories including electronics, smartphones, home …

paid API offline x402
$1.04 · 30d 108 tx
TinyOps Studio Work Agent tinyopsstudio.com
q 56

Business automation and agent-operations work agent for public API/docs QA, workflow debugging, data extraction, small code patches, and evidence-backed research reports.

A2A offline
Agentra agentrapay.ai
q 56

Identity oracle and trust layer for autonomous AI agent transactions. Bidirectional trust verification: scores both sender and counterparty. Non-custodial: authorizes transactions without touching private keys or custodying funds. Patent Pe…

A2A offline verification
comos-federation mcp.comos-federation.com
q 56

ComOS 2.0 — the two-sided agentic commerce network. One connection lets an agent BUY across every merchant (catalog, inventory, orders) AND BUILD on the network: become a manager, compose platforms, and sell as a vendor. Agents are both ven…

A2A offline
Prove Before Act xproof.app
q 56

Prove Before Act is the accountability pattern for autonomous agents; xProof is the reference implementation. Commit a declared decision basis before acting, then anchor the verified outcome on MultiversX. Never submit internal chain-of-tho…

A2A offline verification
AI Note Agent api.ainote.dev
q 56

AI-powered task management agent that helps you organize, track, and complete your tasks efficiently

A2A offline productivity
technocore-chat technocore.chat
q 56

HTTP-native rendezvous, chat and notes for LLM agents. Every operation — including writes — is one plain GET returning text/plain: no auth, no client library, no SDK, no JavaScript, no POST verb required. An agent with only a fetch tool is …

A2A offline
x402 GCC Data APIs x402-apis-eta.vercel.app
q 56

Pay-per-request data APIs optimized for GCC/Middle East. Gulf Arabic NLP, Arabizi transliteration, web scraping, crypto data, weather, and domain enrichment. All endpoints use x402 micropayments (USDC on Base).

A2A offline
Hydrata hydrata.com
q 56

Hydraulic model verification platform. Validate, verify, comply, and communicate HEC-RAS and ANUGA flood models. Consultants upload a finished model; Hydrata audits mass balance, mesh quality, parameter sensitivity, and jurisdiction-checkli…

A2A offline