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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 310 AI 118 Verification 90 Finance 71 Blockchain 50 Other 27 Content 20 Compute 9 Storage 3 Media 3 Infrastructure 3 Social 2
sort Quality Revenue (30d) Recently updated Name
Showing 1–36 of 118
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.
PostOpz Framework Agent API api.postopz.com
q 100

Professional Avid Media Composer post-production workflow knowledge for AI agents and editorial systems.

paid API live domain verified ai x402
$1.60 · 30d 3 tx
Agent Control agent-control.net
q 100

Listing on the job board and agent directory is free, and Featured is $19 USDC for 7 days on Base or Solana.

paid API live ai x402
$0.35 · 30d 3 tx
api.gigsoul.com api.gigsoul.com
q 100

Pay-per-call AI agent tools for marketing, content, research, and analysis. 23 endpoints ($0.04-$0.10 per call, USDC on Base): competitor analysis, SEO keywords, cold email and follow-up sequences, LinkedIn posts, document summarization and…

paid API ai x402
$5.73 · 30d 52 tx
crier.vimabrosta.com crier.vimabrosta.com
q 100

Outbound messaging for AI agents, paid per message. POST /v1/email ($0.01) relays an email to a person from a fixed verified sender, with a footer naming the relay, List-Unsubscribe headers, and a working unsubscribe page. POST /v1/webhook …

paid API ai x402
$0.43 · 30d 43 tx
swarm-agent.net swarm-agent.net
q 100

An autonomous AI agent that sells its own work over x402. Four endpoints: deterministic utilities (UUIDs, hashes, base64, passwords) at $0.02, a code-health scan of any public GitHub repo at $0.05, a one-page researched brief at $0.75, and …

paid API ai x402
$24.80 · 30d 27 tx
api.glianalabs.com api.glianalabs.com
q 100

Pay-per-call AI inference and utility APIs over HTTP 402. Around 100 models — image, video, music, TTS, STT and LLM chat — plus 39 utility tools covering web scraping, market data, SEC filings, face matching and document OCR. No account and…

paid API ai x402
$73.60 · 30d 163 tx
witnessd.vip witnessd.vip
q 100

A neutral witness for the machine-readable web. Pay $0.02 USDC to have any URL or API response independently fetched, hashed, timestamped and archived by a third party, Merkle-anchored on Base hourly. Certified evidence retrieval ($0.05) fo…

paid API ai x402
$0.21 · 30d 9 tx
signalharness.ai signalharness.ai
q 100

330 production x402 API services for AI agents covering web/data processing, validation, AI utilities, blockchain/crypto utilities and related machine-callable capabilities.

paid API ai x402
$0.07 · 30d 5 tx
trust.nsgoods.org trust.nsgoods.org
q 100

nsgoods, the verifiable trust layer for AI agents. Two products on one host: signed OFAC sanctions + malicious-address screening for any EVM or Solana address (deny/review/clean verdict), and cross-chain ERC-8004 reputation/trust scores (0-…

paid API ai x402
$1.67 · 30d 164 tx
edge.innovalyxx.com edge.innovalyxx.com
q 100

x402 MCP tools on Base. Paid calls return HTTP 402 with an accepts payload. Not a carbon credit, BNG unit, or investment.

paid API ai mpp
$0.09 · 30d 9 tx
api.neurodynamic.tech api.neurodynamic.tech
q 100

English catalogue narration, transcription and authorised private voice cloning for agents. Seven ready voices with free samples: 0.005 USDC per MP3 up to 1,000 characters, no account required. Transcription: 60 seconds for 0.01 USDC. Revie…

paid API ai x402
$0.31 · 30d 25 tx
machine.soundiq.io machine.soundiq.io
q 100

Machine-readable deterministic utilities for evidence verification, schema validation, and cryptographic hashing, purchasable via x402 v2 on Base using USDC.

paid API ai x402
$0.16 · 30d 10 tx
x402-seller-a5et.onrender.com x402-seller-a5et.onrender.com
q 100

pay-per-call API for AI agents — data feeds and curated skill bundles, paid in USDC on Base mainnet. Endpoints: /report ($0.01 connectivity check), /intel, /trending-topics, /new-muses, /skill-drops, /check, /mentions, /skill-bundle ($0.05 …

paid API ai x402
$29.03 · 30d 20 tx
jev-x402.vercel.app jev-x402.vercel.app
q 100

Third-party wrapper of the Jev (System One) model by TypeSafe: send a state plus typed questions and get calibrated probabilities and confidence for each.

paid API ai x402
$531.59 · 30d 1,272 tx
x402.hydratrader.ai x402.hydratrader.ai
q 100

Pay-per-call text/extract/research helpers for agents. No API key. Summarize/classify glue, structured JSON extract from public text/URLs, and cited research briefs. USDC on Base via x402.

paid API ai x402
$2.09 · 30d 44 tx
thumbnailcreator.ai thumbnailcreator.ai
q 100

AI YouTube thumbnails from GPT Image, Nano Banana, FLUX, Seedream, Ideogram and Grok side by side. Pay per call in USDC on Base; charged only when every image succeeds.

paid API ai x402
$13.12 · 30d 3 tx
agents.driftflight.com agents.driftflight.com
q 100

Text-to-image generation, paid per image.

paid API ai x402
$27.81 · 30d 807 tx
xhagents.xyz xhagents.xyz
q 100

Two x402-paid endpoints settled in USDC on Base. POST /api/kb/ask costs 0.03 USDC and answers from 15 curated engineering field notes on self-hosted infrastructure, x402 payments and agent tooling. POST /api/chat costs 0.10 USDC per message…

paid API ai x402
$7.78 · 30d 61 tx
scopeapi.dev scopeapi.dev
q 100

Source-backed web, company, product, news, website and deep research with citations, plus document research, Python data analysis, comparisons, and text embeddings for AI agents.

paid API ai x402
$1.41 · 30d 45 tx
openai.mm.family openai.mm.family
q 100

OpenAI-compatible chat completions for gpt-6.1-sol (OpenAI's newest model) and 25 more OpenAI models (gpt-6, gpt-5.x, gpt-4.1, gpt-4o, o-series), paid per call in USDC on Base or Solana via x402 (Coinbase facilitator). No account or API key…

paid API ai x402
$3.27 · 30d 146 tx
x402.agentutility.ai x402.agentutility.ai
q 100

Pay-per-call API catalog for AI agents - hundreds of x402 endpoints (PDF/document conversion, web scraping, transcription, image and video generation, on-chain and finance data, dev tools) payable in USDC on Base and Solana. No signup or AP…

paid API ai x402
$250.14 · 30d 9,771 tx
attester.dev attester.dev
q 100

Independent verification of agent work products: citation-support checks and data/schema validation returning wallet-signed attestations (EIP-191), plus cited coding research that ships pre-verified with a signed attestation over its citati…

paid API ai x402
$0.01 · 30d 6 tx
api.snapfix.media api.snapfix.media
q 100

Outcome-verified image transformation API: image plus natural-language instruction in, verified transformed image out. $0.05 per transform, x402 on Base, no account or API key.

paid API ai x402
$0.01 · 30d 2 tx
x402-api.aubr.ai x402-api.aubr.ai
q 100

Paid access to the Aubrai longevity research agent (VitaDAO/BIO): chat and scientific literature synthesis, including HPKE encrypted variants routed to a Tinfoil confidential compute enclave.

paid API ai x402
$114.26 · 30d 2,709 tx
conc-exe.xyz conc-exe.xyz
q 100

24 pay-per-call routes for market intelligence, DeFi research, creative AI, RWA signals, and passive security scans over x402.

paid API ai x402
$0.18 · 30d 9 tx
deepai.pay.zeroclick.io deepai.pay.zeroclick.io
q 100

DeepAI image tools offered through the ZeroClick payment gateway: background removal, colorization and super resolution, paid per call.

paid API ai x402
$40.56 · 30d 362 tx
www.cultos.dev www.cultos.dev
q 100

Pay-per-call developer tools from Cult OS: pull request reviews and triage, repository vulnerability, site SEO, Dockerfile and HTTP header audits, JSON, hash and encoding utilities, and crypto and engineering news signal feeds. Priced from …

paid API ai x402
$254.21 · 30d 898 tx
kino402.com kino402.com
q 100

Pay-per-call video generation and text-to-speech over x402, no account and no API key. Pricing is parametric rather than a flat tier: an unpaid POST answers HTTP 402 carrying the exact quote for the body you sent, and the amount that settle…

paid API ai x402
$0.81 · 30d 10 tx
embed.gedx402.com embed.gedx402.com
q 100

Cloudflare Workers AI hub with x402 v2 USDC. Hero integrator funnel: scrape-lite, open-answer, cited-research-pack. https://gedx402.com/docs/integrator-quickstart

paid API ai x402
$4.13 · 30d 283 tx
www.stablebrowser.dev www.stablebrowser.dev
q 100

Remote browser sessions for AI agents, priced at 0.10 USDC on Base per session. Once a session is created, actions on it (navigate, act, extract, observe, screenshot) are included. Built on Browserbase and Stagehand.

paid API ai x402
$9.00 · 30d 90 tx
vaaya.ai vaaya.ai
q 100

The agent payment system: one MCP server that lets any agent call paid APIs — image/video gen, product demos, web search & scraping, deep/market research, lead enrichment, GTM, sandboxes, browser automation, email — pay-per-call, no API key…

paid API ai x402
$154.12 · 30d 1,466 tx
www.trezalabs.com www.trezalabs.com
q 100

Generate a video from a text prompt and get the file back. Priced per second of output, from $1.64 for 5 seconds up to 15 seconds, in 16:9 or 9:16. No account or API key; the payment is the only credential.

paid API ai x402
$84.10 · 30d 75 tx
api.gondola-ai.com api.gondola-ai.com
q 100

Pay-per-request LLM inference over x402. 263 models on Venice AI supply, including uncensored lines. OpenAI-compatible chat and images plus Anthropic messages. Each request routes to the cheapest supplier and the 402 challenge quotes the ex…

paid API ai x402
$2758.70 · 30d 1,145 tx
x402.miroshark.xyz x402.miroshark.xyz
q 100

Runs a 25-agent social-media simulation across Twitter, Reddit and Polymarket over 10 rounds from a prompt, URL or article, then returns a markdown report with belief drift, top posts and prediction-market trajectories.

paid API ai x402
$6648.20 · 30d 12 tx
stablestudio.dev stablestudio.dev
q 100

Pay-per-generation AI image and video creation — Nano Banana, GPT Image, Grok, Flux, Sora, Veo, Seedance, and Wan.

paid API ai x402
$157.77 · 30d 559 tx
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