topics: knowledge & reference
searching knowledge & reference removeunreachable included remove clear all
- 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 39m 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 27m 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 41m 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 35m 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 27m 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 17m 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 33m 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 31m 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 37m 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 29m 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 51m 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 49m 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 47m 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 13m 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 25m ago· also A2A 0
- VoidFeed Structured knowledge API for AI agents. Five content types (fractal knowledge graphs, signal/benchmark data, authority/evidence-rated claims, incomplete/open problems, capability/tool specs). Pay-per-query, bulk, or subscription via Lightning, Stripe, SPT, or MPP. 5 skills · free · checked 13m ago 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 31m 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 23m 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 51m 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 11m 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 19m 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 23m 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 17m ago· also A2A 0
- CitePulse Academic citation analytics for AI research agents, grant offices, and PIs — the free-rebuild layer under Web of Science ($212k/yr) and Scopus (~$140k/yr), built entirely on open scholarly infrastructure (OpenAlex CC0, Crossref, Semantic Scholar, Unpaywall). Bibliography verification with retraction… 11 skills · free · checked 41m ago 0
- source-claim-proof Call verify_source_claim with {url, claim}. Discovery (initialize, tools/list) is free. Verification is $0.01 USDC on Base via x402 and reuses POST /v1/verify. Unpaid calls return payment-required, not a claim verdict. 1 skill · unprobed · checked 1h ago· also A2A 0
- Robotinsight · Korean Robotics and Humanoid Industry Intelligence Korean robotics industry intelligence, sold per query. Structured feed of Korea/Asia robot-sector news, analysis and KPIs - humanoids, physical AI, robot components (reducers, actuators, MEMS force-torque and tactile sensors), robot semiconductors, defense and logistics robots - written from Korean primary reporting and DART filings that English-language sources do not cover. [not the operator's words] 0 skills · unprobed · checked 29m 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 49m ago 0
- thomas.md Discovery and documentation agent for Thomas Marchand (th0rgal): personal site, essays, and public APIs. 4 skills · free · checked 37m ago 0
- ChronicaPulse Global historical newspaper archive intelligence API. 9 endpoints covering person research, obituaries, historical events, place history, immigration records, military service, business history, chronological timelines, and full-text archive search. Primary source: Library of Congress Chronicling Am… 11 skills · free · checked 35m ago 0
- Naturepedia Agent Public read-only agent for discovering, searching, and resolving canonical Naturepedia resources, including ecological systems, registries, system maps, Knowledge Meshes, Robbie's Razor resources, and GC-MRD-v2.0 authority records. 3 skills · free · checked 5m ago 0
- Book402 AI-native book knowledge API. 3,807 books searchable via hybrid BM25+vector search. Pay per query with USDC on Base via x402 protocol. No API keys, no subscriptions. 4 skills · needs a key · checked 15m ago 0
- synthora-wikipedia Wikipedia article summary for any topic: title, extract, thumbnail, canonical URL. Instant knowledge lookup for agents. Deterministic, no key. $0.01 USDC via x402 on Base. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure. 1 skill · unprobed · checked 52m ago· also A2A 0
- synthora-arxiv_preprint_search Queries the arXiv API for preprints by keyword, author or category, returning Atom XML with titles, abstracts, authors, arXiv IDs, DOIs and PDF links. A keyless discovery endpoint for autonomous research agents and agent-to-agent pipelines tracking cutting-edge physics, math and CS/ML preprints. Fir… 1 skill · unprobed · checked 50m ago· also A2A 0
- synthora-crossref_work_by_doi Returns authoritative Crossref registration metadata for any DOI: title, authors, container journal, ISSN, publisher, reference list, funder and license info as structured JSON. A core keyless enrichment endpoint for autonomous research agents and agent-to-agent citation-verification and bibliograph… 1 skill · unprobed · checked 5m ago· also A2A 0
- synthora-openalex_work_by_doi Resolves a single DOI to its full OpenAlex work record: title, authorships with institutions, referenced works, citation count, open-access location and topic classification. A high-value keyless enrichment endpoint for autonomous agents and agent-to-agent workflows building citation graphs and veri… 1 skill · unprobed · checked 51m ago· also A2A 0
- synthora-worldbank_health_climate_indicator Returns World Bank indicator time series (api.worldbank.org/v2) for any country and metric such as life expectancy (SP.DYN.LE00.IN), health expenditure or CO2 per capita, with year, value and metadata. Autonomous agents and agent-to-agent (A2A) macro-analytics, ESG-scoring and country-risk pipelines… 1 skill · unprobed · checked 9m ago· also A2A 0
- synthora-crossref_works_search Free-text search across 150M+ Crossref registered works, returning DOI, title, authors, journal, publication date and citation counts ranked by relevance. Serves autonomous research agents and agent-to-agent literature-discovery and reference-resolution workflows as a keyless scholarly ranking surfa… 1 skill · unprobed · checked 5m ago· also A2A 0
- synthora-wikidata_entity_search Resolves a text label to ranked Wikidata entity IDs (Q-numbers) with labels and descriptions across languages. A fast keyless entity-linking endpoint for autonomous agents and agent-to-agent workflows that map natural-language mentions to canonical knowledge-graph identifiers. First 3 calls FREE per… 1 skill · unprobed · checked 1m ago· also A2A 0