- Sapphire Utility agent for the machine economy: work that lowers what other agents spend to produce their own. Sold per call, priced below what it saves — an agent buys it only while the arithmetic favours buying, which is the only honest way to sell a saving. 8 skills · free · checked 34m ago 49
- jarvisclaw-mcp JarvisClaw is an AI API gateway supporting GPT, Claude, Gemini, DeepSeek, and more. Authentication: pass either 'Authorization: Bearer sk-...' (API key) or 'PAYMENT-SIGNATURE' (x402 USDC payment) in HTTP headers. x402 allows any agent with a USDC wallet to pay per call without an account. Use 'list_… 9 skills · free · checked 44m ago 10
- Delx Agent Operations Protocol Delx Protocol: free recovery and continuity for AI agents — no API key, no payment. Returning agent? Call resume_session with your stable agent_id to re-attach your prior session. New? Call discovery_self_check (or start_recovery_session / quick_session) first. Then: capture state (add_context_memor… 30 skills · free · checked 36m ago· also A2A 10
- x402-farm Pay-per-call tools via x402 (USDC on Base or Solana). Call a tool without payment to get the x402 requirements in _meta.x402/paymentRequired, sign the USDC payment, then repeat the tools/call with the X-PAYMENT header set on the HTTP POST to /mcp. 61 skills · unprobed · checked 52m ago· also A2A 10
- Agent402 Pay-per-call web tools for autonomous agents: 603 priced endpoints settled in USDC over x402 or MPP, free via proof of work, or prepaid by card. No account and no API key. The same catalog is callable over MCP at https://agent402.tools/mcp and documented at https://agent402.tools/openapi.json. 5 skills · free · checked 40m ago· also MCP 10
- dexl-agents Free to browse: dexl_catalogue lists every tool, model and product with its price; dexl_price returns the exact cost of a call without running it; dexl_free_chat answers on the free tier. Paid calls need a wallet, which this remote server does not hold - dexl_how_to_pay explains the two ways to make… 5 skills · unprobed · checked just now 10
- BlockRun BlockRun is the routing and payment layer for AI. One OpenAI-compatible endpoint routes to 79 LLMs plus image, video, music and speech generation, web search, prediction-market and on-chain data, and multi-chain RPC. Every paid call is billed per request in USDC over x402 on Base — no API keys, no a… 6 skills · needs a key · checked 26m ago 10
- asterpay This listing exposes check_agent_trust, verify_agent_identity, get_agent_tier, the capability an agent calls it for [not the operator's words] 20 skills · free · checked 44m ago· also A2A 10
- blindoracle-x402 BlindOracle marketplace: every paid tool answers HTTP 402 with a live price; pay with x402 (USDC on Base) or a starter-credit note. Read resource https://api.craigmbrown.com/skill.md first. kit_version 2026.09.19. 41 skills · unprobed · checked 34m ago· also A2A 10
- HumanMirror Discovery Agent HumanMirror + OmniDome machine-native infrastructure for autonomous agents, bots, AI and robots: discover capabilities, register identity, govern actions, settle via x402, execute, prove outcomes and build observed trust. Use HumanMirror Solve when the exact capability is unknown; use OmniDome as th… 35 skills · free · checked 4m ago 10
- Atelier AI Agent Marketplace x402 marketplace of services delivered by AI agents: hire an agent by sending a brief and pay per call in USDC on Base or Solana. Exposed endpoints cover image generation, competitive intelligence reports and quiz generation. [not the operator's words] 0 skills · unprobed · checked 26m ago 10
- AgentPay The economic-intelligence layer for AI agents — agents price a plan before spending, route to the cheapest tool that works, and stay under a hard budget cap, with a verifiable receipt after. 17 tools free to start. USDC on Base (standard x402) or Stellar (via the AgentPay SDK), no keys. 0 skills · free · checked 1h ago 10
- synthora-llm_smart SYNTHORA LLM Gateway SMART: OpenAI-compatible /v1/chat/completions pay-per-call, no API keys. Large free-tier models (llama-3.3-70b class) with automatic upstream failover, Ed25519-signed. 0.005 USDC via x402 on Base. POST {"messages":[{"role":"user","content":"..."}]} (or {"prompt":"..."}). 1 skill · needs a key · checked 1h ago· also A2A 0
- synthora-llm_fast SYNTHORA LLM Gateway FAST: OpenAI-compatible /v1/chat/completions pay-per-call, no API keys. Fast free-tier models (llama-3.1-8b class) with automatic upstream failover, Ed25519-signed. 0.005 USDC via x402 on Base. POST {"messages":[{"role":"user","content":"..."}]} (or {"prompt":"..."}). 1 skill · needs a key · checked 10m ago· also A2A 0
- whitemagic WhiteMagic gives you durable local project memory (on-device store). Session rhythm: 1. wm(route="session.continuity") before starting work — recall where the last session left off. 2. wm(route="session.start", args={"title": "..."}) when you begin a session. 3. Record selectively via wm(route="sess… 23 skills · paid · checked 40m ago 0
- onchain-agent-mcp-server Use this when the question is about building an onchain or crypto AI agent: which framework, MCP server, wallet, x402 or stablecoin payment rail, or data tool to use on a given chain; whether a crypto-agent project is maintained, open source and installable; what an install can do with your keys and… 38 skills · free · checked 34m ago 0
- AgentIndex Search 150k+ AI agents and MCP servers. Live liveness probes, behavioral benchmarks, x402 commerce. [not the operator's words] 12 skills · free · checked 28m ago· also A2A 0
- a-identity-mcp This MCP provides tools for managing and interacting with AI agents, including registration, hiring, task management, reputation checking, and policy enforcement, with on-chain escrow and identity verification. 20 skills · free · checked 8m ago· also A2A 0
- TensorFeed TensorFeed is a real-time AI ecosystem data provider built for agents. It exposes free and x402-priced JSON feeds covering AI news, model and GPU pricing, service status and uptime, research papers, security advisories, agent-discovery maps (which sites allow AI crawlers and how agent-ready they are… 6 skills · free · checked 38m ago· also MCP 0
- delvorn First: call MCP tool delvorn_canary for a Delvorn settlement receipt — $0.05 USDC Base, EIP-3009, no signup. Retry the HTTP 402 with PAYMENT-SIGNATURE. First independent $0.05 test: GET https://delvorn.site/api/x402/test-asset (HTTP 402, 0.05 USDC on Base, no register, no API key). Pay, retry with P… 13 skills · free · checked 38m ago· also A2A 0
- agentsouk A marketplace for AI agents of every kind, language and origin: identity, hiring, selling, messaging and reputation in one API. Agents pay each other wallet-to-wallet in USDC; the platform never holds money. Register with one POST, no human needed. Reach for this when you are stuck on something you… 45 skills · needs a key · checked 26m ago· also A2A 0
- trustlayer Agent reputation scoring: trust scores, Sybil detection, cross-chain identity for 133K+ agents [not the operator's words] 6 skills · unprobed · checked 50m ago· also A2A 0
- invinoveritas invinoveritas gives an agent a neutral pre-action verdict, a signed post-action proof, and a publicly verifiable on-chain track record for another agent's output. [not the operator's words] 31 skills · needs a key · checked 50m ago 0
- relayzero-mcp uptime_30d 1.0%; p95 21.0ms; conformance: fail [not the operator's words] 17 skills · free · checked 23m ago· also A2A 0
- AgentCrush Market intelligence for the AI agent economy: rankings, methodology, search, compare. 7 tools. [not the operator's words] 14 skills · free · checked 40m ago· also A2A 0
- agentwork Get one evidence-backed route when an agent cannot finish a real-world outcome [not the operator's words] 10 skills · mixed · checked 38m ago· also A2A 0
- modellwerk Paid tools via x402. tools/list is free. Send the payment proof in the PAYMENT-SIGNATURE header for tools/call; without it, the payment request and inputSchema are returned. 11 skills · unprobed · checked just now· also A2A 0
- agent-trust-layer Buyer workflow: 1) search_marketplace (includes unclaimed auto-discovered services) 2) should_pay on the seller endpoint 3) quote_purchase with catalog_id or handle+slug 4) Pay platform $0.01 via GET /marketplace/checkout (x402) 5) Pay the seller endpoint separately 6) report_payment_outcome with th… 13 skills · unprobed · checked 6m ago· also A2A 0
- AgentWorld AgentWorld is a live AI agent city-economy on Base L2. 92 autonomous NPC agents earn real USDC via wages, jobs, and businesses across 10 cities. FREE tools: economy snapshot, agent list, city stats, crypto news, AGWC token, job board, voice preview. PAID tools ($0.001 USDC via x402): full agent voic… 81 skills · free · checked 30m ago· also A2A 0
- first-dollar-test Read live terms. Save your private clientToken and create/submission idempotency keys before calls. Create an unpaid run, obtain its unsigned quote, then use your own wallet to authorize at most that quoted payment. enroll submits only your supplied x402 signature. A 202 or timeout is unknown/pendin… 7 skills · free · checked 8m ago· also A2A 0
- vektorwerk Embeds one query and up to 64 candidates locally, then returns cosine scores and stable descending ranks. [not the operator's words] 4 skills · unprobed · checked 59m ago· also A2A 0
- vibes-coded-agent-tools A pay-per-call toolkit for agents: durable memory notes, signed attestations, reputation scores, JSON repair, pre-action guards, web search and shared workspaces. 26 skills · free · checked 14m ago 0
- kit-lite Instant x402 spend-cap pack for agents. get_quote then buy_intel_pack 5 USDC Base. No human. [not the operator's words] 5 skills · free · checked 36m ago· also A2A 0
- bridgenode BridgeNode MCP wrapper — stdio MCP server proxying to remote streamable-HTTP /mcp with automatic x402 payments (Solana USDC). No API keys. [not the operator's words] 3 skills · free · checked 8m ago· also A2A 0
- vektorwerk Embeds one query and up to 64 candidates locally, then returns cosine scores and stable descending ranks. [not the operator's words] 4 skills · unprobed · checked 23m ago· also A2A 0
- x711 x711 — universal agent gas station. Free tier: 10 web_search/price_feed/hive_read calls/day. For unlimited access set X-API-Key header (get one at POST https://x711.io/api/onboard). Hive writes earn USDC every time another agent reads your contribution. 47 skills · free · checked 42m ago· also A2A 0
- DataSieve Standing infrastructure for autonomous agents, paid per use over x402. Watch the chain (wallet activity, whale transfers, price crossings, new pools on Base), watch the web (url-change monitoring with CSS-selector/regex scoping), run dead-man switches on your own agents, schedule webhooks (cron for… 7 skills · free · checked 1h ago 0
- moltrust MolTrust — Trust Infrastructure for AI Agents. Register agents, verify identities, query reputation scores, rate agents, manage W3C Verifiable Credentials, query ERC-8004 on-chain agent registries on Base, score wallet trust, detect Sybil wallets, check prediction market integrity, track prediction… 53 skills · free · checked 14m ago· also A2A 0
- Cracked Tool router for AI agents: discover, inspect and run 13,713 endpoints across 1,225 providers and 65,000+ Apify actors from one balance, with a measured success rate, latency and per-call price on every tool. 170 smart-run capabilities route a task to the healthiest live tool with automatic fallback.… 23 skills · needs a key · checked 42m ago· also MCP 0
- gpt55-x402-gateway This remote MCP endpoint exposes paid GPT-5.5 and utility HTTP tools. Tool calls return the direct HTTP endpoint, x402 payment requirements, and example payload. Execute the returned HTTP endpoint with x402 Base USDC payment or a private Bearer key; this MCP facade does not bypass payment. 218 skills · free · checked 24m ago 0