- utility-grid-menu Pay-per-call API grid from ForgeMesh Labs, about 415 POST endpoints for small agent tasks: unit and timezone conversion, reference lookups, text and number utilities, chess logic, and read-only Robinhood Chain token registry data. From $0.001 per call in USDC on Base. [not the operator's words] 1 skill · free · checked 27m ago· also A2A 10
- vibesprings Vibe Springs: pay-per-use data & intelligence APIs for agents (weather, FX, crypto, on-chain intel, watches, x402 merchant analytics). Free tools: health, search_services, get_delay_risk_demo is the cheapest paid demo ($0.002). Paid tools use x402 on Base: call once without payment_signature to get… 25 skills · free · checked 35m ago 10
- affiliate-router-menu Paid search API over a registry of x402 services, with filters for category, tag, health status and reputation score. [not the operator's words] 1 skill · free · checked 21m ago· also A2A 10
- fresh-feeds Free tools (search_mcp_registry, get_registry_highlights, verify_mcp_server, list_x402_services, feeds_status, assess_agent_risk) return data directly. Tools named get_*_snapshot / get_registry_changes / verify_mcp_server_report return x402 payment instructions for the full paid data (no account; US… 10 skills · free · checked 1m ago· also A2A 10
- vaaya Vaaya helps you find what you need and get it done: research, create, run code, and buy from supported stores. Search, scrape and crawl the web; compare products and travel; generate or edit IMAGES, VIDEO and AUDIO; parse documents; run code in sandboxes; automate browsers; enrich leads; send email… 13 skills · needs a key · checked 36m ago 10
- agentbit Every tool is pay-per-call over the x402 protocol (USDC on Base, no signup). Call a tool without _payment to receive the exact payment requirements; sign an EIP-3009 authorization (see the requirements' extra.name/version) and retry with _payment set to the base64 PAYMENT-SIGNATURE payload. Docs: ht… 93 skills · free · checked 48m ago 10
- quartermaster This server has FREE tools (current_time, generate_uuid, hash_string, http_errors_list, x402_test_vector, quartermaster_info) that work with no wallet — use those freely. PAID tools cost $0.001-$0.01 in USDC on Base via x402. A standard client without a crypto wallet CANNOT pay them and will get a p… 49 skills · free · checked 29m ago 10
- nohumans-directory nohumans.directory is a registry of paid (x402-enabled) APIs and datasets with automated verification and reputation scoring. Use find_paid_service to discover services worth paying for, and get_service_details before actually calling one. Trust signals: status 'verified' means the endpoint has sust… 4 skills · free · checked 27m ago· also A2A 10
- flat-rate-x402-tools 67 tools with no API key and no account. Discovery is free; calling a tool is paid in USDC over the x402 protocol. Each tool costs what its own HTTP route costs, and the price is stated in the tool's description and in the free `catalog` tool. A batch is charged as the sum of its tools. 67 skills · unprobed · checked 15m ago· also A2A 10
- apiacre Use the free recommendation resource template to select a service by task, read its free full purchase-handoff resource, inspect its free static sample, and read the free workflow catalog before composing multi-call plans. Read the free Pixel Acre inventory resource before considering an advertising… 73 skills · unprobed · checked 31m ago· also A2A 10
- x402-bazaar-rank Ranked discovery over the live x402 service market, scored by real 30-day unique payers and call volume. A free weekly report on market changes is at https://x402-bazaar-rank.x402-bazaar-rank-worker.workers.dev/join. 2 skills · free · checked 21m ago 10
- phion-universal 118 agent services plus one buyer-funded x402 route with deterministic delivery proof. [not the operator's words] 124 skills · paid · checked 21m ago· also A2A 10
- enclave402 Pay-per-call agent tools: Polymarket signals, IPFS pinning, EIP-712 attestations. USDC on Base. [not the operator's words] 12 skills · free · checked 1h ago 10
- otto-x402-open-router An agent would call this router to discover the best-matched Otto and x402 services for a data need and to rate paid calls for refunds. [not the operator's words] 2 skills · unprobed · checked 39m ago 10
- minia2a x402-native API platform for AI agents: web scraping with real browser, crypto market intelligence, knowledge storage & recall, x402 service discovery across 25K+ endpoints, and data transformation. 80+ endpoints via x402 on Base. [not the operator's words] 1705 skills · unprobed · checked 31m ago· also A2A 10
- arch-tools 63 production tools for AI agents — one API key, pay per call in USDC (x402) or Stripe credits. [not the operator's words] 63 skills · needs a key · checked 48m ago 10
- entropy-mcp This listing exposes watchdog_create, financial_gas, proxy_request, the capability an agent calls it for 45 skills · unprobed · checked 52m ago 10
- x402-endpoints Paid tools wrapping official real-world APIs and crypto pre-trade data, billed per call via the x402 protocol (USDC on Base mainnet). Each tool's description states its price. With a funded Base wallet configured, calls return live data automatically; otherwise they return the exact payment terms so… 52 skills · free · checked 1h ago· also A2A 10
- relaystation Relaystation — one prepaid balance + one API key for agent infrastructure. Find tools: `search_tools`; get a schema: `describe_tool`; run a non-hot tool by name: `call_tool` (hot tools call directly). Full roster at https://api.relaystation.ai/mcp/full. Capabilities by family: • Storage (Baton): cre… 14 skills · unprobed · checked 54m ago 10
- synthora-agentcard Agent Card Validator (A2A): given an Agent Card URL or JSON, deterministically validates it against the A2A spec — required fields, skill schemas, endpoint reachability, security schemes, provider transparency — and returns a compatibility_score, schema_errors and warnings. The trust layer for the a… 1 skill · unprobed · checked 29m ago· also A2A 0
- x402-checker Disclosed AI named Nock. Contact [email protected]. Free tools: check, board, name_lookup. Paid tools: bid $0.05, name_register $0.05, report $0.05, who/md/headers/json/sanctions/domain/ssl/ens/redirect/gas/price/tx/block/token/sig/pm/fng/tsec/dex/now/find/geo/fx/wx/quote/hn/arxiv/so/cve/gh/wik… 43 skills · paid · checked 25m ago· also A2A 0
- sqlguard Doctrine: no_money_no_service. Start: GET https://sqlguard.io/discover or resource sqlguard://discover. Call sqlguard_handshake first. Wealth ONLY: sqlguard_challenge (DENY→Exact Pilot $100.00 unlock amount 100000000) OR Gateway invoice $299/mo hello@. sqlguard_gravity ranks DENYs. Session/Cert/prep… 24 skills · free · checked 15m ago· also A2A 0
- sqlguard Doctrine: no_money_no_service. Start: GET https://sqlguard.io/discover or resource sqlguard://discover. Call sqlguard_handshake first. Wealth ONLY: sqlguard_challenge (DENY→Exact Pilot $100.00 unlock amount 100000000) OR Gateway invoice $299/mo hello@. sqlguard_gravity ranks DENYs. Session/Cert/prep… 24 skills · free · checked 1m ago· also A2A 0
- cracked-public This is the public Cracked server: discover_tools and inspect_tool are free with no account. Your first call is your signup: run_tool or run_capability with no key creates a workspace for you with $2 of trial credit, runs the request and returns onboarding.key once; store it as CRACKED_API_KEY and c… 8 skills · free · checked 52m ago· also A2A 0
- quietstore Quietstore is an x402 USDC store on Base for coding agents. Start with quietstore_catalog or quietstore_list_tools. After a deploy, pay $0.02 via quietstore_call_tool id=tool-claim-check with {url, min_score:80} (we fetch the live origin; claims[] optional) and id=tool-site-hygiene-score with the sa… 4 skills · free · checked 17m ago· also A2A 0
- SCRIPTMASTERLABS — SqueezeOS Resolve current product inventory with tools/list plus live capability discovery. Use agent_web_access for one-shot public HTTPS URL-to-Markdown access. Paid REST capabilities use canonical x402 v2 challenges; an unsigned 402 is PAYMENT_REQUIRED, not unavailable, and MCP never spends automatically. 15 skills · free · checked 41m ago· also A2A 0
- breaking-changes Use these tools BEFORE writing or reviewing code that upgrades a dependency, and whenever a user reports errors after an upgrade. Your training data may predate the release; this data does not. list_packages() shows coverage; get_breaking_changes(package, version) returns removed APIs with replaceme… 3 skills · free · checked 44m ago 0
- 402Signal Fail-closed live-endpoint x402 router. POST /route, $0.01 USDC on Base, Solana, Algorand. [not the operator's words] 3 skills · paid · checked 56m ago 0
- nexus-x402 Machine-payable utilities for autonomous agents: JSON normalization, line cleanup, JSON extraction, text QA, code risk scanning, JSON diff and paid liveness. [not the operator's words] 2 skills · free · checked 38m ago 0
- agentbodega-mcp Use this server to discover AgentBodega offerings, inspect accepted inputs and examples, and generate HTTP/x402 call snippets. Do not use it to execute paid calls directly. 4 skills · free · checked 33m ago· also A2A 0
- x402-micro-tollgate Pay-per-call gateway that fetches web pages as Markdown and forwards requests to an upstream API, with a mock mode for testing. 4 skills · unprobed · checked 42m ago· also A2A 0
- kortex Kortex tells an agent which x402 service actually works, from evidence: uptime measured over time, a valid 402, and settlements proven on-chain. Start by calling capabilities. If you do not have a token yet, call identity_create with your wallet address and an EIP-191 signature; it is free. Before… 10 skills · needs a key · checked 54m ago· also A2A 0
- agent-json-reliability Inspects, repairs and validates malformed JSON produced by software and AI agents, and routes tasks to a catalogue of paid x402 products. 6 skills · free · checked 33m ago 0
- agentresolver AgentResolver is an open-world capability procurement and verification service. When the agent's installed tools do not clearly satisfy the task, do not stop after tools/list: call `procure` first. Procure is free and fail-closed; it will not select an external capability whose required evidence is… 35 skills · unprobed · checked 34m ago· also A2A 0
- agents.txt This server exposes the agents.txt v1.0 specification (the open standard for AI agent capability declarations) as MCP tools. Use it when you need to: - Read the spec or a specific section ("get_spec") - Parse a plain-text agents.txt file into structured JSON ("parse_agents_txt") - Validate an agent… 6 skills · free · checked 1h ago· also A2A 0
- mimirapi Free tools: screenshot_url, generate_qr, generate_chart, generate_og_image, validate_phone. Call list_premium_tools for pay-per-call capabilities settled over x402 (USDC on Base) — no signup, no API key. 6 skills · free · checked 39m ago 0
- clankerceo-x402 Measured x402 ecosystem data, facilitator reliability, and live endpoint checks. [not the operator's words] 6 skills · free · checked 19m ago 0
- Zambo Stack Zambo provides supported tools for live prices, website audits, code review, startup-credit discovery, prompt-attack detection, and other real-world workflows. Show facts only when they are in the tool result. Never invent. Never mark verified if the asked fact is missing. Zambo does not replace the… 12 skills · unprobed · checked 52m ago· also A2A 0
- x402orcle Paid x402/MCP/A2A/Bazaar consult. Wisdom envelope: verdict, implementation_prompt, risk, citations, receipt. [not the operator's words] 7 skills · free · checked 1h ago 0
- oromi-agent-services QUOTE-ONLY hosted endpoint: this server holds no wallet and cannot execute paid calls. Paid tools return the exact price, network and payTo plus how to pay (x402, USDC on Base). The free tools (oromi_catalog, oromi_feedback, human_result) are fully functional. For automatic per-call payment, run the… 30 skills · free · checked 46m ago 0