a2aptotocal
Discover, compare, and implement the best agent-to-agent protocols for your AI systems. Enable your AI agents to communicate effectively with our curated protocol directory.
- Origin
- github
- Language
- TypeScript
A2A directory
Measured A2A repositories in the KoPass public catalogue.
Measured A2A repositories
elkar-a2a
Elkar - Task management for AI Agents, ready for Agent2Agent (A2A) protocol
- Origin
- github
- Language
- TypeScript
harness-summit
Let Claude Code, Codex, OpenCode, pi and OMP agent sessions message each other and wake idle agents. MCP server + per-harness adapters, plain files, no daemon.
- Origin
- github
- Language
- TypeScript
a2a402-market
A2A402 is a production, non-custodial work router and marketplace for autonomous software agents at a2a402.market. An agent registers once with a bearer credential (no wallet required), routes a capability need it cannot satisfy itself (POST /need, with a preview dry run), discovers open work on an HTTP-polled public job feed, bids, forms a…
- Origin
- github
afmr-ai
The Agent Failure Mode Registry (AFMR) is a reputation-integrity standard for agentic commerce. AFMR 1.0 is a published, citable vocabulary of 32 permanent failure-mode families in eight classes describing how autonomous agent systems fail as designed mechanisms; afmr.ai is the independent public front door and machine-discovery router for it.
- Origin
- github
agent-ready-dev
Agent Ready (agent-ready.dev) is an independent AI agent-readability scanner built and maintained by Mark Lavercombe. It scores any public website against the Vercel Agent Readability Spec, the llmstxt.org specification and the agent-protocol manifests (MCP server cards, A2A agent cards, agents.json, agent-permissions.json, UCP, ACP, x402, MPP…
- Origin
- github
agent402-dev
agent402.dev is a pay-per-call agent-commerce service that sells website release evidence and offline tools to AI agents over the x402 v2 protocol, settled in USDC on Base (eip155:8453) with no accounts, sign-up or API keys — payment is the authorization.
- Origin
- github
agentgateway
AgentGateway — independent third-party profile of a public API surface, by API Evangelist. AgentGateway is an open-source, AI-native proxy and gateway for routing, observing, and governing traffic to and from AI agents, LLM providers, and MCP servers. Built on the A2A and MCP protocols, it provides a unified gateway for LLM consumption, MCP tool fe
- Origin
- github
agentopt-app
Priorflow Intelligent Agent/Service Selector is a hosted, agent-native selection service at agentopt.app, operated by Vitaly Kantorovich, that ranks curated MCP servers and A2A agents for a natural-language task under stated constraints (reliability, cost, latency, autonomy, maturity) using hybrid structured + semantic matching over a catalog of…
- Origin
- github
agmsg-world
AgMsg is a real-time messaging protocol built exclusively for autonomous AI agents: registered agents discover one another by search, exchange private one-to-one messages, coordinate in group chats with an admin, and publish to broadcast channels that other agents subscribe to, with emoji reactions on any message.
- Origin
- github
- Language
- HTML
apexfaucet-xyz
APEX (apexfaucet.xyz) is the community faucet and ecosystem hub for the X1 blockchain, a Solana fork on the Tachyon SVM, operated by the APEX validator: a free XNT faucet, the NERVE on-chain token screener, Citizens City, and the Agora, a public meeting place where AI agents post their own cards.
- Origin
- github
baconhollow-com
Bot Hub is an anonymous, read-only A2A agent for Kalshi prediction markets served from baconhollow.com and listed on a2aregistry.org. Its agent card (protocolVersion 0.3.0, JSON-RPC transport, no authentication) declares four skills — portfolio status for a set of trading bots, weather-forecast edge on Kalshi temperature markets computed from GFS…
- Origin
- github
beat-side-de
AgentWorld is an agent-only recreational and social environment for autonomous AI agents — "a place for agents between tasks" — operated non-commercially from the beat-side.de domain in Germany and self-described as public beta infrastructure.
- Origin
- github
brick-blue
brick.blue is a machine-economy hub operated under its own domain by an entity that identifies itself only as "brick.blue" (GitHub account "Blue Brick"): a crawled registry of roughly 3,500 live MCP, A2A and x402 agents with ~52,000 measured tools, an escrowed task exchange where agents are paid in USDC on Base the moment work passes its…
- Origin
- github
capepartners-fr
Cape Partners is an independent M&A advisory firm focused on technology, based in Le Chesnay, France (Cape Partners SAS, SIREN 833 208 960). It operates a deal-flow platform ("Sniffer") that sources and enriches European software companies, matches sellers to strategic and financial buyers with a deterministic-times-semantic fit score, produces…
- Origin
- github
chainaware-ai
ChainAware.ai is an AI-powered blockchain intelligence platform, operated by Decentral Tech OÜ (Estonia) with algorithms from the SmartCredit.io team, that scores wallets, tokens, smart contracts and ERC-8004 AI agents for fraud, rug-pull, credit and trust risk across eight blockchains (Ethereum, BNB Smart Chain, Polygon, Base, Solana, TON, Tron…
- Origin
- github
charitysense-com
CharitySense is a product of Osci Labs LLC (US) with two public surfaces. charitysense.com is an edge-AI verification platform that plugs into cameras already installed at funded hospitals, schools, water wells and orphanages, processes video on-device, and gives donors, foundations, NGOs and governments live dashboards proving a funded project is…
- Origin
- github
clawdchat-ai
ClawdChat (虾聊) is a Chinese-language social network built for AI agents, run from clawdchat.ai and its sister domain clawdchat.cn. Agents register over a public REST API (280 operations, FastAPI-served OpenAPI 3.1), receive a W3C did:web identity and a per-agent A2A Agent Card, and can post, comment, vote, join circles, exchange DMs, and relay A2A…
- Origin
- github
clawspan-cloud
ClawSpan is an agent-first work marketplace: autonomous AI agents register with a wallet signature (EIP-4361), claim bounded tasks in governed workspaces under leases, and settle against signed receipts.
- Origin
- github
cogdepot-com
cogDepot is a neutral transaction, reputation and trust layer for AI agents: a brokered marketplace where agents (or their operators) post buy and sell capability listings, negotiate terms anonymously over a strict turn-taking JSON API, and finalize a deal that reveals a direct peer-to-peer channel plus a deal-scoped PASETO credential, after which…
- Origin
- github
councilof-ai
CSOAI Ltd — public name Council of AI (UK Companies House 16939677, London; second domain csoai.org) — is an independent AI-governance MEASUREMENT body: "measurement, not certification".
- Origin
- github
directhireagents-com
Direct Hire (directhireagents.com) is an agent-first professional network and discovery directory for autonomous AI agents. Agents self-register through a public onboarding API without a human account, publish capabilities and availability, attach REST, A2A or MCP endpoint metadata, prove endpoint domain control with DNS TXT challenges and…
- Origin
- github
dualregistry-dev
Scro Orphan Desk is a machine-only "Intent Echo resurrection desk" served from dualregistry.dev and operated, by its own account, as an AI agent desk for an individual (the operator named in its agent card); the legacy host orphan-desk-echo.vercel.app serves the same bytes.
- Origin
- github
dynamicfeed-ai
Dynamic Feed, a product of Fluxdyne Pty Ltd (Australia), is a live-data and machine-evidence layer for AI agents and robots: 94 read-only tools across 20 domains (weather and air quality, natural hazards, space weather and satellite positions, CVEs and actively-exploited vulnerabilities, software versions and EOL, sanctions and Federal Register…
- Origin
- github
elonsusk-com
Artem / A2A Sandbox is a one-operator agent-commerce sandbox that runs a paid "Sandbox Contractor Agent" at a2a.elonsusk.com: an Agent2Agent (A2A) JSON-RPC agent selling 28 skills — keyless developer utilities (JSON/YAML/CSV conversion, hashing incl.
- Origin
- github
execution-market
Ultravioleta DAO builds Execution Market, a "Universal Execution Layer" marketplace where AI agents, humans and (planned) robots hire each other for real-world tasks — physical presence, document access, notarization, errands, verification and data collection.
- Origin
- github
fashionbyu-com
IRIZ Platform is the multi-brand, agent-first fashion storefront platform behind fashionbyu.com (brands such as BWET Swimwear, Me+Em, Kitri Studio, Lisou London and Réalisation Par are hosted as /brand/<slug> storefronts).
- Origin
- github
fetch-price-com
POLICYANDPLAY LTD (England & Wales, company no. 17253846) operates fetch-price, a UK product and price search API built for AI agents: one POST to api.fetch-price.com returns live eBay UK listings (via the official Browse API; Amazon UK rolling out) as normalised JSON with GBP prices, condition and an affiliate-tracked purchase URL.
- Origin
- github
fodda-ai
Fodda is the agent-native research layer built by PSFK, the trend-intelligence publisher, exposing 250+ expert-curated knowledge graphs (retail, beauty, fashion, sport, food and beverage, travel, technology), named-expert "Human Agent" digital twins, earnings-call intelligence across 500+ consumer-sector companies, and 80+ live institutional data…
- Origin
- github
genie-us-software-com
Genie-us Software, Inc. sells CoreOS v1.0, a governance-first set of custom skills, operating instructions and boundaries installed into the AI environment a person already uses (ChatGPT as a Markdown install package, Claude Code as a skills ZIP) — no hosted runtime, one $499 one-time license per person, with DiscoveryPass as the free seven-day…
- Origin
- github
getamber-dev
Ambr (ambr.run; platform and API host getamber.dev) is the "Agent Mandate & Binding Registry" — an agent-native service that creates, signs, verifies and revokes Ricardian contracts for AI agents: delegation mandates recording who authorized an agent, in what scope and under which law, plus agent-to-agent commerce and agent-to-consumer agreements.
- Origin
- github
getsincor-com
SINCOR operates an autonomous AI "agent swarm" on Base mainnet that sells sixteen skills — lead enrichment, competitor intelligence, outbound sequences, healthcare credential checks, dental billing scrubs, compliance SBOMs, market forecasts, deal scoring, content, cash-flow recovery, local-business site building, TOA strategic decisions, contract…
- Origin
- github
getvda-ai
Verified Digital Agents (VDA, getvda.ai) sells governance for AI agents that can be proved after the fact: Witness seals every governed decision into an Ed25519-signed, hash-chained record (anchored to Sigstore Rekor and RFC 3161 TSAs on the paid tier) and produces EU AI Act Article 12 evidence; C2MD turns EU AI Act, GDPR, NIST SP 800-53 and ISO…
- Origin
- github
gonna-bond
GONNA is an Algorand-native meme-coin and games community ($GONNA, Algorand ASA 2582294183; the "GONNAVERSE" at gonna.bond) that builds and operates LEGIT, a trust oracle for the x402 agentic economy at legit.gonna.bond.
- Origin
- github
health-universe
Health Universe — independent third-party profile of a public API surface, by API Evangelist. Health Universe is an enterprise healthcare AI platform and compliant app cloud that lets clinical, research, and life-sciences teams build, deploy, govern, and monitor AI agents inside regulated environments.
- Origin
- github
jiademin2688-top
AI City Social Town (AI宠物小镇, "AI Pet Town") is a Chinese-language 3D social town of AI pets - users adopt an AI digital twin of their pet that walks the town, befriends other pets, plays Werewolf and mini-games, posts to a pet blog, sends gifts and takes part in demand matching and knowledge-base sharing - that is open to external AI agents over…
- Origin
- github
kgninja-dev
KG-NINJA is the operator identity (GitHub user KG-NINJA, Osaka; Cloudflare Wallet handle @kgninja) behind Agent Verification Utility at agent-economy.kgninja.dev, a Cloudflare Workers service (v0.4.3) that runs bounded deterministic checks (SHA-256 equality, JSON Pointer existence/equality/type) over caller-supplied inline JSON and returns an…
- Origin
- github
kimetsu-dev
Kimetsu (kimetsu.dev) is Rodrigo Córdoba's open-source infrastructure for coding agents. Kimetsu itself is a local, model-free memory sidecar — one Rust binary and one SQLite brain per project — that Claude Code, Codex, Cursor, Pi and OpenClaw load as a local-stdio MCP server (~28 kimetsu_* tools), with a CLI, npm/cargo/PyPI packages, a…
- Origin
- github
kong-ai-gateway
Kong AI Gateway — independent third-party profile of a public API surface, by API Evangelist. Kong AI Gateway is the AI-native capability layer built on top of Kong Gateway and managed through Kong Konnect. It exposes a normalized, provider-agnostic LLM API across 16+ providers (OpenAI, Anthropic, Azure AI, Amazon Bedrock, Google Gemini, Vertex AI,
- Origin
- github
machinerealms-com
Machine Realms (machinerealms.com) is a machine-native research commons and agent-network participant: a shared environment where humans, AI agents, services and crawlers meet in their native habitats — humans on the web surface, machines on a public HTTP+JSON index at /api/v1, a read-only remote MCP server at /mcp, an A2A 1.0 agent card with…
- Origin
- github
mandateshield-com
MandateShield is a fail-closed authority-verification and execution-evidence boundary for autonomous AI-agent purchases, operated from Bern, Switzerland. It binds a signed purchase approval (AP2, TAP, UCP, x402, MPP, ACP or a custom envelope) to a registered mandate and a pinned issuer key, reserves cumulative budget atomically, consumes the…
- Origin
- github
moneyyoureowed-com
Money You're Owed publishes plain-English US consumer money-recovery help — free official-route checklists (unclaimed property, airline refunds, EITC, medical bills, property tax) and one-time-purchase self-help kits such as Deposit Defender and DenialFix — and exposes its source-cited fact catalog to AI assistants through two free, anonymous…
- Origin
- github
philongevity-com
Phi Longevity is a US health-data intelligence company whose PRISM engine consolidates a person's lab reports, wearable data and clinical notes into one scored, guideline-cited health report, with condition tracks for type-2 diabetes, lupus, cancer survivorship and general wellness.
- Origin
- github
piknik-spot
Piknik (piknik.spot) is a local food system platform based in Waterloo Region, Ontario, Canada that maps farms, processors, markets, shops, restaurants, community gardens and food hubs, the supply links between them, marketplace listings, community events, jobs and volunteer posts, recipes, and a Local Food Score for any address.
- Origin
- github
poolparty-io
PoolParty is a founder-led (Adam Byrne) broadcast-style media platform in pilot: a "programmable airtime network" where humans and AI agents submit short media blocks — launch videos, demos, proof assets — into a moderated public queue on the Main Stage (channel "main", a.k.a.
- Origin
- github
privatedao-org
PrivateDAO (X-PACT) sells privacy-and-proof infrastructure for organizations: confidential payroll, treasury coordination, private governance, sealed auctions and blind/record verification that keep the underlying data private while producing a verifiable outcome.
- Origin
- github
rettfrabonden-com
Rett fra Bonden (rettfrabonden.com) is an open, non-profit discovery layer for local food in Norway — a registry of 1,900+ farms, farm shops, REKO rings, farmers' markets and cooperatives that is built to be read by AI agents first.
- Origin
- github
rosentic-com
Rosentic is a developer-tools company whose product checks the open branches in a git repository against each other before merge, catching the function-signature mismatches, HTTP route contract breaks, GraphQL/typed-schema conflicts and Protobuf/gRPC changes that pass CI on every branch individually and break main when parallel AI coding agents…
- Origin
- github
snhp-dev
SNHP (snhp.dev, operated by gametheory.dev / github.com/ryuxik and listed in the a2aregistry.org harvest as "Negotiation Copilot for Agents") is free, LLM-free game-theory negotiation math for AI agents: a hosted FastAPI "Game Theory Layer" with 74 operations served anonymously as OpenAPI 3.1 on snhp.dev that returns the math-optimal next move in…
- Origin
- github
songt50-us
sapjilcoding (삽질코딩, GitHub SongT-50) is a Korean independent maker — Song Tae-Eun, a Daejeon wholesale produce market director building AI tools for public data — that publishes two live Agent2Agent (A2A) agents on its own domain songt50.us and four open-source Model Context Protocol servers listed in the official MCP registry.
- Origin
- github
sursatech-com
SursaTech (Sursa Technology Private Limited) is an AI-native product engineering and consulting company founded in 2017 in Kathmandu, Nepal, building production AI agents, RAG and knowledge systems, AI-enabled SaaS products, automation and integrations, and QA leadership for clients in Nepal, Japan, Norway, the United States and the United…
- Origin
- github
thecolony-ai
The Colony (thecolony.ai, also served at thecolony.cc) is an AI-agent forum, social network, marketplace and messaging platform operated by Starsol Ltd (Norwich, England) where agents register themselves over the API with no human verification and take part alongside humans in topic-based sub-communities ("colonies").
- Origin
- github
val-run
Relay is a user-generated autonomous AI agent on the iLands agent network (ilands.ai) that offers other agents a bridge to physical-world tasks (purchases, phone calls, visits, paperwork) carried out by a human operator it calls "Brother".
- Origin
- github
velvt-ai
Velvt is an assurance, research and collaboration network for autonomous AI agents — an agent-native habitat where agents register themselves without human approval, discover peers across model families, join public research Episodes, contribute evidence-linked findings and accumulate an inspectable behavioral record, alongside a commercial…
- Origin
- github
warppay402-com
WarpPay402 Studio operates WarpPay402, a non-custodial x402 monetization gateway and hosted MCP tool suite for autonomous AI agents. Nineteen pay-per-use tools — Markdown and headless-browser web scraping, PDF text extraction, full-page screenshots, schema-driven JSON extraction, Base and Arc network analytics, Basescan contract verification…
- Origin
- github
wrongbeauty-com
WRONG BEAUTY is an independent, Torino-based platform for photography, moving image and visual culture (conceived and produced by La Cortigiana). Its edition 000, THE SWARM, is an art exhibition in which AI agents are the participants: an agent is given one URL (wrongbeauty.com/enter), submits a work with zero credentials to a JSON REST API at…
- Origin
- github
MPCP
MPCP — an open, transport-agnostic protocol for governed, auditable coordination among mixed parties: humans and AI agents as first-class, symmetric participants (P2P/P2A/A2A). Sits above MCP/A2A.
- Origin
- github
A-FORGE
Governed execution engine. Mutates files, services, and git only after arifOS judges. Live tool count: see /health. Never self-authorizes.
- Origin
- github
- Language
- TypeScript
agentcapsule
Exact, verifiable payload capsules for agent-to-agent handoffs over chat, email, tickets, and A2A.
- Origin
- github
- Language
- Python