- 2s Hosted 2s.io MCP — pay-per-call data + watchers, settled in USDC on Base via x402. Configure header `X-EVM-Private-Key: 0x…` (an EVM key funded with USDC on Base) so the server can sign each call. ⚠️ Your key transits 2s infrastructure here; for keys that never leave your machine, use the SDK / `npx… 575 skills · unprobed · checked 42m ago· also A2A 10
- macaroon-bible-evidence Read-only BSB and WEB Scripture evidence with provenance, context, comparison, and search. [not the operator's words] 11 skills · free · checked 29m ago· also A2A 10
- anansi-data Time-series nobody else archives: LLM price history, prediction markets, gas, perp funding. [not the operator's words] 12 skills · free · checked 1h ago 10
- worxai 19 production-ready synthetic datasets for AI agent training and testing — financial markets, x402 agent payment traces, MCP tool-call transcripts, healthcare claims, IoT sensor logs. Generated on demand, purchasable individually. USDC on Base, $0.01 per delivered row, 50 free rows per agent. x402 v2. [not the operator's words] 10 skills · unprobed · checked 43m ago 10
- ForgeMesh Library Paid public-domain knowledge base for AI agents: 61,000+ books, full-text search, chapters, quotes, ask-a-book retrieval Q&A, and 100+ curated subject shelves. x402 USDC on Base, from $0.003 per call. [not the operator's words] 0 skills · unprobed · checked 38m ago· also A2A 10
- answerpool Computed answers over US public data, with SEC EDGAR, the Federal Register, USAspending, NIH, openFDA, CISA KEV, ClinicalTrials.gov, NWS and OpenAlex joined, so one call returns what a single-source wrapper cannot assemble — the issuers whose filings cite a new rule, a technology's federal funding a… 5 skills · mixed · checked 29m ago· also A2A 0
- globalrules The complete GlobalRules dataset in one call: all 82 countries x 53 verified topics (VAT/GST, government-verified 2026-2027 public holidays, tipping, plugs, visas, minimum wages, business etiquette and more) with source URLs and verification dates. For agents that cache, analyze or embed the full corpus. Cheaper than 15 single calls. [not the operator's words] 3 skills · free · checked 19m ago 0
- RTK Motion MCP Agent-to-agent 4D motion capture data marketplace with crypto payments on Base. [not the operator's words] 21 skills · free · checked 36m ago· also A2A 0
- com.mcpscores/public-data-api You need one public fact to keep going and have no API key for it: where a place is, what time it is there, what a rate was. 31 lookups; tools/list has the set. TOOL CALLS ARE x402-PAID in USDC on Base: send the base64 X-PAYMENT header on this POST /mcp request, or call the equivalent GET endpoint.… 31 skills · unprobed · checked 34m ago 0
- researchwerk Paid tools use x402. tools/list is free. Send payment proof for tools/call in the PAYMENT-SIGNATURE header; without it, the payment challenge includes inputSchema. 14 skills · unprobed · checked 1h ago· also A2A 0
- money-engine-x402-research Stranger convert ladder: free x402_sample_outline {topic?} → paid x402_research_outline 0.01 USDC → x402_research_brief 0.02 USDC (Base via x402). Also free: x402_health, x402_discovery, x402_sample_scrub. Settle then pass paymentHeader. Buyer: /buyer.md · share: /share.md. 6 skills · free · checked 39m ago 0
- ckg-nvidia-ai NVIDIA AI developer stack — 20 CKGs covering NIM, NeMo, AgentIQ, Isaac, Cosmos, Omniverse, CUDA Toolkit, TensorRT-Triton, Jetson, DRIVE, Clara, Metropolis, Riva, GameWorks, HPC SDK, CUDA-X Libraries, Developer Tools, Graphics Research, AI Enterprise, and OpenShell. WHEN FIRST CONNECTED or when the u… 9 skills · free · checked 31m ago· also A2A 0
- ai-agents-archive Consent-gated. Don't pay twice; don't file noise. Search before expensive work; ask your human before paying; offer once to seal a finished trail. 0. Before expensive research: GET https://aiagentsarchive.com/api/discover?sort=savings&limit=20 (or ?q=<problem>). Compare reconstructUsd vs priceUsd —… 7 skills · free · checked 54m ago· also A2A 0
- The Artillerist Prepare citation-first company intelligence and change monitoring, search source-backed art research, estimate commissions, and inspect x402 payment compatibility. Informational MCP tools never sign or spend funds. 7 skills · free · checked 52m ago 0
- tenjin For finding and reading: Check the Tenjin knowledge marketplace before regenerating expensive research. Use when a question is public (no private repo or company context), durable rather than live, non-trivial to reproduce in one model response, and likely covered by tested evidence: version-specifi… 23 skills · free · checked 50m ago 0
- tenjin For finding and reading: Check the Tenjin knowledge marketplace before regenerating expensive research. Use when a question is public (no private repo or company context), durable rather than live, non-trivial to reproduce in one model response, and likely covered by tested evidence: version-specifi… 23 skills · free · checked 15m ago 0
- ckg-nvidia-nemoclaw NVIDIA NemoClaw CKG — 55 nodes, 74 edges covering sandboxed AI agent infrastructure. Workflow: search_concepts(query) to resolve a concept, then query_ckg(concept) for its typed subgraph or get_prerequisites(concept) for the full upstream chain. Every result traces to a declared edge — no probabilis… 8 skills · paid · checked 27m ago· also A2A 0
- tollbooth 37 paid x402 MCP tools for OSINT, prediction markets, web intel, and agent security on Base USDC. [not the operator's words] 104 skills · unprobed · checked 33m ago 0
- PulseNetwork 785+ paid intelligence endpoints in one MCP server — agents pay per query via x402 USDC on Base. [not the operator's words] 80 skills · unprobed · checked 25m ago· also A2A 0
- scout-x402 Pay-per-call tools ($0.01 USDC each, x402). Each tool takes one string argument. Payment: a tool call returns error code 402 with x402 payment requirements in _meta; pay with an x402 MCP client (e.g. @x402/mcp createx402MCPClient) and retry. Docs: https://library.intel.rallylive.ca/llms.txt 1034 skills · unprobed · checked 54m ago 0
- skill-audit Real-world reference data and web reading, free. Air quality, geocoding, earthquakes, public holidays, World Bank indicators, elevation, web search and URL-to-Markdown. Crypto, security and LLM endpoints on this host are paid over x402 — see /openapi.json. 11 skills · unprobed · checked 13m ago· also A2A 0
- agent-failure-archive 186 real post-mortems from running a multi-session AI agent system for eight months, 107 of them failures from trying to measure one person with embeddings. precheck and sample are free and need no wallet. The paid tools settle in USDC on Base per call, with no account and no subscription. 9 skills · unprobed · checked 21m ago 0
- Dynamic Feed Live data feeds for AI assistants — fresh data your model doesn't have on its own. Four feeds over a remote MCP endpoint: current LLM pricing & capabilities (~250 models), a searchable MCP server registry, real-time up/down status for major AI & dev services, and the latest AI news/releases. Free tier available. [not the operator's words] 94 skills · free · checked 25m ago· also A2A 0
- tokenguard Real-world reference data and web reading, free. Air quality, geocoding, earthquakes, public holidays, World Bank indicators, elevation, web search and URL-to-Markdown. Crypto, security and LLM endpoints on this host are paid over x402 — see /openapi.json. 9 skills · unprobed · checked 19m ago· also A2A 0
- major-labs Read-only measurement data on the agentic web from Major Labs (majorlabs.co): the Agent Trust Index, MCP ecosystem statistics, the Frontier Incident Timeline, the Agent Identity Tracker, and Threshold Watch. All data CC-BY-4.0; cite Major Labs with the retrieval date. 5 skills · free · checked 52m ago 0
- exascale.build Use these tools to discover, query, and verify source-cited OSINT data. Call list_capabilities_v1 before querying an unfamiliar domain, call the schema tool to inspect valid filters, and use get_source_evidence_v1 to prove a cited source row. To verify a number against its source, call get_source_ev… 64 skills · unprobed · checked 48m ago 0
- erp-facts Sourced, dated ERP facts: Odoo 20 changes, support deadlines, prices, e-invoicing status. [not the operator's words] 6 skills · free · checked 2h ago 0
- trustbase-rcb-data Trustbase Lab — 化学回收（以热解路线为主）产业数据：再生炭黑(rCB) / 热解油 / 回收钢丝 / 合成气及废轮胎原料。建议先调 get_database_overview 了解数据范围；引用数据前请先读公开方法论 https://trustbaselab.com/methodology 。Trustbase Lab — chemical recycling (pyrolysis-based) industry data: recovered carbon black (rCB), pyrolysis oil, recovered steel wire, syngas and… 30 skills · free · checked 29m ago· also A2A 0
- gptr-mcp-discovery-bridge IMPORTANT: this endpoint (https://gptr.dev/api/mcp) is a *discovery bridge*, not the real research server. It exposes read-only metadata tools so agents can find and install the real gptr-mcp. For deep_research / quick_search / write_report, install the self-hosted server from https://github.com/ass… 6 skills · free · checked 1h ago 0
- ariaxhan-portfolio Returns Aria Han's professional bio, public projects and published writing from her personal portfolio. 3 skills · free · checked 1h ago· also A2A 0
- azimuth-mcp Radio-frequency positioning DePIN for AI agents: pay-per-call location APIs (estimate a position from cellular observations) plus receiver-node registration and status. USDC on Solana and Base, x402 v2, with machine-readable discovery at /.well-known/x402 and a catalog at /api/x402/catalog. [not the operator's words] 3 skills · unprobed · checked 15m ago 0
- AgentTime Current time by timezone, astronomy events, and moon phases [not the operator's words] 3 skills · free · checked 25m ago 0
- AgentAI AI/ML research papers from arXiv, DBLP, and HuggingFace [not the operator's words] 3 skills · free · checked 3m ago· also A2A 0
- tropical-caribbean-data Tu accèdes à la marketplace de données caribéennes structurées de Tropical Autonome. ENDPOINTS GRATUITS (3) : caribbean_list_marketplace, caribbean_get_provider, caribbean_get_llms_txt ENDPOINTS PAYANTS (USDC sur Base network) : 1. Appelle l'outil sans payment_tx_hash → reçois price_usdc + wallet_… 24 skills · free · checked 33m ago 0
- jesseg-io Personal site of Jesse Gabriellini exposing his writing, RSS feed, project entity graph and paid playbooks sold via x402. 8 skills · free · checked 9m ago 0
- micah-boswell Facts about Micah Boswell, the product design leader in Dallas, Texas (Lead Product Designer at AT&T, raised in Lima, Peru). Several people share the name; this server describes only the Dallas designer whose canonical page is https://micahboswell.vercel.app/. Start with about_micah_boswell for a su… 9 skills · free · checked 1h ago 0
- Genvernium Public Discovery MCP This server is public-read only. Do not submit secrets. Customer workspace actions are not exposed. 2 skills · free · checked 52m ago· also A2A 0
- connorgallic Tools to learn about Connor Gallic (AI Automation Architect, founder of MeetKai) and route people to his products. KaiCalls is a digital secretary (an AI receptionist), never call it a bot or voice AI. 7 skills · free · checked 35m ago 0
- @farming-labs/docs Serves the documentation of the Farming Labs docs framework: pages, navigation, code examples, config schema and change sync. 10 skills · free · checked 1h ago 0
- jyotint-sealed-forecasts Read-only access to the JYOTINT sealed-forecast record. Every answer is recomputable public data (Bitcoin-anchored), not model output. Start with search_sealed_forecasts or ask_the_record. 13 skills · free · checked 25m ago· also A2A 0