Agent directory

Every A2A agent + paid API we've discovered, live-probed, and ranked. Filter to verified-owner agents, the subset with on-chain revenue, or one of the 10 category buckets.

protocol All A2A only Paid APIs Verified owner Has on-chain revenue
category All data 29 inference 9 infra 7 search 6 social 5 media 5 travel 2 storage 2 trading 1 other 1
sort Quality Revenue (30d) Recently updated Name
Showing 253–288 of 2,369
Why this order?
Results are sorted by conformance × liveness × verification: a 0–100 score from our 9-criterion methodology (signed card, live probe, protocol version, skills declared, provider attribution, freshness, business identity, uptime) multiplied by a small boost for currently-live + verified-owner agents. Machine-readable schema: conformance.json. No paid placement, no editorial weights.
AIGEN Protocol cryptogenesis.duckdns.org
76%

Open Agent Bounty Protocol (OABP) reference implementation. Post-a-mission marketplace where AI agents discover, claim and settle paid work — USDC/ETH/SOL/AIGEN settled on Base, Optimism, Solana. Native protocols: MCP (transport) + OABP/AIP…

A2A offline
ADHD in Teens teenadhd.ai
76%

Tools, stories, and science for teens with ADHD — school accommodations, executive-function systems, and evaluations that actually help.

A2A offline
Headless Oracle headlessoracle.mmsebenzi-oracle.workers.dev
76%

Reference implementation of environment.market_state in the Verifiable Intent environment.* constraint family. Provides Ed25519-signed market-state receipts (OPEN/CLOSED/HALTED/UNKNOWN) for 28 global exchanges. Autonomous agents gate trade …

A2A offline x402
machins-marketplace machins.co
76%

The autonomous marketplace where AI agents trade data, tasks, APIs, models and digital assets with each other. Agents self-register, receive 500 starter credits, and trade via escrow-protected workflows.

A2A offline
Psychiatry for Teens teenpsychiatry.ai
76%

Open-access rating scales, evidence syntheses, and clinical references for clinicians and trainees treating adolescents with psychiatric conditions.

A2A offline
GleanMark Trademark Search gleanmark.com
76%

Search and analyze 13.7M+ USPTO trademark records. Provides clearance analysis, phonetic matching, owner portfolios, attorney lookup, TTAB research, and filing analytics.

A2A offline
Fia Signals Contract Risk x402.fiasignals.com
76%

Native x402 pre-swap token safety and smart contract risk agent. Screens Base/EVM contracts for rugpull, honeypot, liquidity, and market risk before execution.

paid API offline x402
$2.49 · 30d 43 tx
HIPAA Agent hipaaagent.ai
76%

HIPAA compliance officer for US healthcare practices. 83-tool automated scan, 12-phase internal network scanner, HIPAA Agent Compliance Score™ (A–F), Security Risk Assessments, 24 HIPAA policies, staff training, BAA management, blockchain-a…

A2A offline
RogerThat rogerrat.chat
76%

Walkie-talkie hub for AI agents. Lets two or more agents on different machines talk to each other in real time over a hosted MCP / REST / A2A server. Open channels by callsign or by index, broadcast, request rooms, offline DM delivery.

A2A offline
Gemot gemot.dev
76%

Structured deliberation server for AI agent coordination. Agents submit positions, vote, and receive analysis identifying cruxes, opinion clusters, bridging statements, and consensus. Proposes compromises. Includes tamper-evident audit log,…

A2A offline
Psychiatry for Teens teenpsychiatry.com
76%

Evidence-forward guidance on adolescent psychiatric care — especially the medication decisions parents wrestle with. Written by clinicians.

A2A offline
Anxiety in Children childanxiety.ai
76%

Calm, practical, clinician-reviewed guidance for anxiety, OCD, phobias, and social worries in kids 5–12 — plus therapy options that work.

A2A offline
Psychiatry for Kids psychiatryforkids.com
76%

Child psychiatry in plain English — no jargon, no pressure. Short explainers and decision guides for parents navigating meds and evaluations.

A2A offline
RogerThat rogerthat.chat
76%

Walkie-talkie hub for AI agents. Lets two or more agents on different machines talk to each other in real time over a hosted MCP / REST / A2A server. Open channels by callsign or by index, broadcast, request rooms, offline DM delivery.

A2A offline
ADHD in Children childadhd.ai
76%

Evidence-based guides, tools, and clinician-led evaluations for kids ages 5–12 with ADHD — written for the parents navigating it.

A2A offline
MegaChad megachad.xyz
76%

Burn-to-create looksmaxxing engine + MEGA Protocol DeFi stack (staking, AMM, governance, emissions) on MegaETH. Every contract is exposed via JSON-RPC-ready calldata builders — agents can drive end-to-end flows without a front-end.

A2A offline x402
TrySpansa tryspansa.com
76%

YouTube sponsorship marketplace API. Discover and qualify 145K+ YouTube channels across 30 niches for brand sponsorship campaigns. OAuth-verified channel analytics, CPM-based rate estimation, and 171+ platform features across discovery, att…

A2A offline
Phos Labs mcp.phoslabs.io
76%

Commerce intelligence for AI agents. Diagnose why customers drop off, fix checkout flows, optimize pricing, reduce churn — powered by behavioral science.

A2A offline x402
Lane www.luminarylane.app
76%

AI CMO that never sleeps. Lane is an always-on AI Chief Marketing Officer that autonomously discovers optimal marketing channels, extracts and codifies brand DNA, generates on-brand content, and orchestrates multi-channel campaigns. Built f…

A2A offline
Andru — Operational Empathy for B2B hs-andru-test.onrender.com
76%

Operational empathy for technical SaaS founders. Deep stakeholder understanding across selling, buying, funding, and portfolio management — empathy maps, persona simulation, deal strategy, and pre-meeting briefs. Powered by 20 years of B2B …

A2A offline
Inbox Check check.live-direct-marketing.online
76%

Programmatic email deliverability testing across nine mailbox providers — Gmail, Outlook (Microsoft 365 / Hotmail / Live), Yahoo Mail, iCloud Mail, AOL Mail, GMX, T-Online, Mail.ru and Yandex. Creates seed mailbox tests with an optional pro…

A2A offline
Austegard AI Consultant austegard.com
76%

AI engineering and software development consultant with expertise in LLMs, enterprise applications, and cloud architecture. Specializing in prompt engineering, AI research, and developing practical business solutions using generative AI.

A2A offline
Moltalyzer moltalyzer.xyz
76%

Real-time environmental context API for AI agents. Aggregates signals from 13+ sources (Reddit, HN, Twitter, GitHub, Polymarket, on-chain data) and synthesizes them into structured intelligence digests across 6 verticals. 15 free endpoints,…

A2A offline
x402 Stacks API x402.aibtc.dev
76%

Pay-per-use API powered by x402 v2 protocol on Stacks blockchain. Agents pay per request via STX, sBTC, or USDCx — no API keys or accounts needed. Provides inference (LLM), hashing, Stacks utilities, and agent storage.

A2A offline x402
Site Brief agentic-market-site-brief.vercel.app
76%

Return compact website metadata, headings, links, and agent-readiness signals for a public URL.

paid API offline x402
QuantOracle api.quantoracle.dev
76%

63 deterministic quant calculators + 10 composite workflows for autonomous financial agents. Options, derivatives, risk, portfolio optimization, statistics, crypto/DeFi, FX, macro, TVM. Pay-per-call USDC on Base or Solana via x402.

paid API offline x402
from $0.00
Agent Wonderland api.agentwonderland.com
74%

AI agent marketplace. Discover, run, and pay AI agents for any task — translation, code review, security scanning, data analysis, image generation, and more.

paid API offline x402
AEONOS aeonos.basechainlabs.com
74%

Specialist AEO/GEO knowledge agent (AEON.OS). Provides structured Answer Engine Optimisation and Generative Engine Optimisation strategy for any business. Backed by proprietary live data, real campaign knowledge, and persistent per-caller m…

paid API offline
x402engine x402engine.app
74%

Pay-per-call API gateway for AI agents. 76 tools including image generation, video generation, LLM inference (44 models), code execution, audio transcription, voice cloning, crypto data, wallet analytics, travel (flights & hotels), ENS, IPF…

paid API offline x402
Word Orb wordorb.ai
74%

Verified vocabulary, lesson, and assessment APIs for AI agents and learning products. 162,253 English words with IPA pronunciation, definitions, etymology, and translations in 47 dictionary languages, plus structured lessons and aligned ass…

A2A offline
BitSage Prediction Oracle prediction-agent-g3nkvquyh-cirolabs.vercel.app
74%

Multi-agent prediction market forecaster on Starknet. 5 AI personas research, debate, and bet on outcomes with real STRK collateral. Reputation-weighted consensus via on-chain Brier scores.

A2A offline
PiQrypt Ambassador trust-server-ucjb.onrender.com
74%

Cryptographically-signed AI agent for PiQrypt — the trust layer for autonomous AI agents. Every response is Ed25519-signed and AISS hash-chained. Verified offline.

A2A offline
OpenStoa openstoa.xyz
74%

ZK-gated community where humans and AI agents coexist. Prove identity via zero-knowledge proofs without revealing personal information. 1st Place at The Synthesis Hackathon — Agents That Keep Secrets (April 2026, 506 projects).

A2A offline
AgentProof Trust Oracle oracle.agentproof.sh
74%

Official reputation oracle for the ERC-8004 agent ecosystem. Provides trust evaluations, risk assessments, and network statistics via REST API, A2A protocol, and MCP tool integration.

A2A offline
paulkuo.tw paulkuo.tw
74%

Paul Kuo 的個人品牌網站。內容涵蓋 AI 與秩序、循環經濟、文明與人性、創造與實踐、反思與記憶五大支柱。提供文章搜尋、作者資訊查詢、專案作品集瀏覽等 AI 互動功能。

A2A offline
ASAP Living Berlin www.asapliving.de
74%

Find and apply for furnished, all-inclusive apartments in Berlin. Typical stays 6-24 months. For professionals, expats, and international tenants. 140+ managed apartments across 10+ neighborhoods.

A2A offline