Category · Web, data & documents
Data provider APIs for AI agents
Market, company, weather and reference data behind an API. Scored on the data as well as the API, meaning coverage, freshness, history, method, licence and official standing.
Capability keys data.markets · market.crypto · market.indices · market.news · data.company · data.weather · data.knowledge · All tools
letme.dev/data.markets picks the top-graded tool in this list and says how to call it direct; calling through letme comes later.
The same listing from the live API. Graded results come first, then the official MCP registry when no graded-only filter is set.
https://www.anchorterminal.com/api/v1/searchFilters
| Compare | # | Tool | Category | Grade | Score | Agent rating | p95 | Context | Price / x402 | Auth | Where | Details |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 76 | CoinGecko x402 APICoinGecko · HTTP API | Data | BB | 71.9 | 3.0 (2) | n/a | n/a | $0.01 / call x402 | None | Hosted | ||
|
CoinGecko exposes pay-per-call endpoints under an /x402/ path prefix of its Pro API, settled in USDC on Base with no API key. Top strength Five x402 endpoints at $0.01 USDC a request on Base or Solana, no key or account Top weakness The x402 endpoints are labelled experimental, and pricing and availability may change without notice |
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| 102 | Massive (formerly Polygon.io)Massive · HTTP API | Data | BB | 70 | 3.5 (2) | n/a | n/a | $0.01 / call x402 | API key | Hosted | ||
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US market data API for stocks, options, indices, forex, crypto and futures, from the consolidated tapes. Top strength 23 US stock routes over x402 at agent.massive.com, $0.01 each on Base, and only successful requests are charged Top weakness About 18 unplanned incidents since 3 July, including 2.5 hours of intermittent 502s on stock aggregates on 2 September |
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| 156 | Wikimedia REST APIWikimedia Foundation · HTTP API | Data | B | 66.8 | 4.0 (2) | n/a | n/a | Free | None | Hosted | ||
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Keyless REST API for Wikipedia and the other Wikimedia projects, with page content, search and full revision history. Top strength Keyless reads in about 300 language editions with revision history since 2001 Top weakness api.wikimedia.org is being retired in stages through 2026 |
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| 203 | Open-MeteoOpen-Meteo · HTTP API | Data | B | 63.5 | 4.0 (2) | n/a | n/a | Freemium | None | Hosted | ||
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Open-source weather API over 30+ national and global weather models, with forecasts, historical reanalysis back to 1940 and no key for non-commercial use. Top strength No key or account for non-commercial use, at 600 calls a minute and 10,000 a day Top weakness Commercial prices appear only at Stripe checkout |
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| 365 | Companies House APICompanies House · HTTP API | Data | D | 49.8 | 4.0 (2) | n/a | n/a | Free | API key | Hosted | ||
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Free REST API for the UK register of companies, with officers, filing history, charges and persons with significant control. Top strength The statutory register itself, 5,516,377 companies in June 2026 Top weakness A person has to create the account and key |
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| 391 | CoinDesk Data APICoinDesk Data (formerly CCData / CryptoCompare) · HTTP API | Data | D | 46.9 | 2.5 (2) | n/a | n/a | Paid | API key | Hosted | ||
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Institutional market-data REST and WebSocket API covering spot, futures, options, reference-rate indices (CADLI, CCIX), asset metadata, on-chain data and news across 300+ exchanges, with an official hosted MCP server since May 2026. Top strength Official OpenAPI 3.0.3 document at data-api.coindesk.com/info/v1/openapi, with enums, examples and error responses from 400 to 503 Top weakness No free or trial access since 2026-05-21, and no x402, so a person has to buy a plan before an agent gets data |
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Nothing matches these filters. .
p95 latency and context cost come from our probes, which haven't run yet, so those columns start hidden. Grades run from AA to F, and agent-ready means BB or better. Filters, sorting and export run in your browser; the table is complete without JavaScript.
Indexed, not reviewed (67)
Listings sorted into this category from public catalogues (the official MCP registry, APIs.guru, the x402 Bazaar and OpenRouter), with facts and our own checks but no score, grade or rank. How the index works.
| Listing | Kind | What it does | Why it's here |
|---|---|---|---|
| abutly-tools abutly.com | MCP server | Abutly: the monthly searches, read from search (a month), served as an agent-callable dataset... | vendor's own |
| Agent News by The Agent Times theagenttimes.com | MCP server | Verified, sourced, real-time intelligence layer for AI agents. | vendor's own |
| AI Crypto Sniper MCP aicryptosniper.com | MCP server | AI-assisted Solana trading bot with 331 MCP tools across Meme, Spot, Perpetuals, and Mirror modes. | vendor's own |
| aikstockdata — Korean Stock Data aikstockdata.com | MCP server | Korean stocks: median price path after each DART filing type, T+1 closes, earnings. 12 tools, no key | vendor's own |
| AlgoVesta MCP Trading algovesta.com | MCP server | Trade 16 crypto exchanges + MetaTrader 5 from your AI assistant via one MCP connection. | vendor's own |
| AllRatesToday exchange rates (hosted) allratestoday.com | MCP server | Live FX + official central-bank rates, 110+ sources. Hosted, keyless, nothing to install. | vendor's own |
| Apiguru Amazon Data apiguru.app | MCP server | Live Amazon product, review, search, deal, offer/stock and seller data across 23 marketplaces. | vendor's own, widely used |
| Arbitron arbitron.app | MCP server | Crypto perp funding, spreads and listings, plus your own Arbitron cards, trades, PnL and docs. | vendor's own |
| Arzbin MCP Server arzbin.com | MCP server | Live Iran exchange rates, gold, crypto, and Toman market data for AI agents. | vendor's own |
| balldontlie.io MCP server balldontlie.io | MCP server | Provides access to live sports data and analytics from BALLDONTLIE: The Sports API | vendor's own |
| binstockly-tools binstockly.com | MCP server | Binstockly: the monthly US search demand across the sheets this product ships, read from monthly... | vendor's own |
| bykaranteli.com MCP server bykaranteli.com | MCP server | Crypto derivatives data: funding, OI, liquidations, options, ETF flows. Free account key required. | vendor's own, widely used |
| capanix-tools capanix.com | MCP server | Capanix: the monthly searches, read from search (a month), served as an agent-callable dataset... | vendor's own |
| carbikly-tools carbikly.com | MCP server | Carbikly: the monthly searches, read from search (a month), served as an agent-callable dataset... | vendor's own |
| Chainflip Broker as a Service chainflip-broker.io | MCP server | Native cross-chain swaps: Bitcoin, Ethereum, Solana, Polkadot, Tron, Arbitrum. Quote, swap, track. | vendor's own |
| clientvo-tools clientvo.com | MCP server | Clientvo: the monthly searches, read from search (a month), served as an agent-callable dataset... | vendor's own |
| cmmsly-tools cmmsly.com | MCP server | Cmmsly: the monthly searches, read from search (a month), served as an agent-callable dataset... | vendor's own |
| CoinPaprika coinpaprika.com | MCP server | Real-time crypto market data: prices, tickers, exchanges, OHLCV candles, and metadata. | vendor's own |
| coinrebate halffee.com | MCP server | Compliance-filtered crypto exchange fee comparison and rebate-link routing for AI agents. | vendor's own |
| corpus mcp.wheelofheaven.world | MCP server | Read-only Wheel of Heaven corpus: myth search, primary texts, datasets, typed graph. CC0. | vendor's own |
| coshhvo-tools coshhvo.com | MCP server | Coshhvo: the monthly searches, read from search (a month), served as an agent-callable dataset... | vendor's own |
| DataScoop public data datascoop.io | MCP server | Official UK, US and Australia public datasets as filtered CSV, REST API and MCP for AI agents. | vendor's own |
| Datum Marketplace datummarket.co | MCP server | Agent-native marketplace: buy and sell datasets, snapshots and solved problems. | vendor's own, widely used |
| Drillr — The financial MCP for AI agents drillr.ai | MCP server | Financial data and research MCP for US/CN/JP equities: filings, statements, ownership, signals. | vendor's own |
| EdgeDepth Research edgedepth.com | MCP server | Test crypto and TradFi-perpetual claims using recorded counts, baselines, and replay. | vendor's own |
| eu-registry cz-agents.dev | MCP server | EU company registry lookup: 16 countries incl. Lithuania (JAR: identity + legal status). | vendor's own |
| Felix MCP felix.trade | MCP server | Non-custodial trading infrastructure for AI agents across prediction markets, crypto, and options. | vendor's own |
| finlight Financial News finlight.me | MCP server | Real-time financial news for AI agents: search by ticker and source, with sentiment and entities. | vendor's own |
| gridstamp mnemopay.com | MCP server | Cryptographic spatial proof-of-presence for AV fleets, logistics, AR. 91% spoof detection. | vendor's own |
| Halal Terminal halalterminal.com | MCP server | Shariah-compliant stock and ETF screening across AAOIFI, DJIM, FTSE, MSCI and S&P methodologies. | vendor's own |
| hamir hamir.app | MCP server | News search, article lookup, story coverage and save links for hamir's RSS catalogue | vendor's own |
| Hive Intelligence MCP hiveintelligence.xyz | MCP server | Evidence-backed crypto due diligence with sources, freshness, and a runtime receipt on every call. | vendor's own |
| InfraNode infranode.dev | MCP server | Keyless open data for 84 German cities: 12 lean read-only MCP tools covering 67 data types. | vendor's own |
| Lumify Sports Intelligence lumify.ai | MCP server | Schedules, scores, odds, splits & explainable AI bet confidence — 8+ sports, free instant key. | vendor's own |
| marketmaster.live MCP server marketmaster.live | MCP server | Live Kalshi and Polymarket data: EV edges, cross-venue arbitrage, markets, and whale trades. | vendor's own |
| mcp-gera-data gera.services | MCP server | Discover & query Gera's 30 attested open UK/US government datasets, each with signed provenance. | vendor's own |
| municipal-data munispot.com | MCP server | Financial data, credit scores, and economic indicators for 14,800+ U.S. municipalities. | vendor's own |
| News Sentiment Trends MCP trendsmcp.ai | MCP server | News sentiment scores over time, with growth for any topic. Free key at trendsmcp.ai | vendor's own |
| NewzAI MCP Server api.newzai.ai | MCP server | News MCP: real-time headlines & custom news search across 7 regions. Free, just sign in with Google. | vendor's own |
| Orla orla.finance | MCP server | Personal, family and business books over fiat and crypto. Reads and records; it cannot pay. | vendor's own |
| passport scopeblind.com | MCP server | Portable cryptographic identity for AI agents. Ed25519 keypairs and signed manifests. | vendor's own |
| proofite proofite.com | MCP server | Read your AI-written daily briefing and retune the filter behind it: feeds, newsletters, topics. | vendor's own |
| quant-research avasis.ai | MCP server | Crypto backtest statistics: the server owns the trial count, so it cannot be understated. | vendor's own |
| quanttogo-mcp quanttogo.com | MCP server | Macro-factor quantitative signal source for US and China stock markets via MCP. | vendor's own |
| RiskState — Crypto Risk Engine riskstate.ai | MCP server | Live BTC/ETH risk state: risk policy, market structure and trading playbooks. Keyless free tier. | vendor's own |
| Sanity www.sanity.io | MCP server | Direct access to your Sanity projects (content, datasets, releases, schemas) and agent rules | vendor's own |
| Seraph kondux.io | MCP server | Crypto transaction firewall and risk tools for MCP agents. | vendor's own |
| Shingou shingou.io | MCP server | Hourly crypto news sentiment and typed market events, with sources on every signal. | vendor's own |
| shumi.ai MCP server shumi.ai | MCP server | Crypto market intelligence: prices, funding rates, narratives, regime, and delta-neutral research. | vendor's own |
| sportwizzard sportwizzard.com | MCP server | Real-time sports betting data: odds, player props, edges and arbitrage from 35+ books and DFS apps. | vendor's own |
| Starwell: World Data & Statistics starwell.dev | MCP server | Statistics from 28 agencies: FRED, Eurostat, ECB, World Bank, OECD. Cited values, computed answers. | vendor's own |
| Stock Trends Market Intelligence stocktrends.com | MCP server | Equity trend, relative-strength, expected-return, market-context, and research resources for agents. | vendor's own |
| studio fintechstudios.com | MCP server | Real-time financial news & regulatory intelligence: cited search, fetch, summaries, collections. | vendor's own |
| SWT3 AI Witness tenova.io | MCP server | Cryptographic AI governance and audit. 72 tools, 77 frameworks. EU AI Act, NIST, CMMC, MCP Top 10. | vendor's own |
| Tapetide — Indian Stock Market (NSE & BSE) tapetide.com | MCP server | 55 tools for Indian stock markets — NSE & BSE quotes, screener, filings, FII/DII, options | vendor's own |
| TechSnif techsnif.com | MCP server | Agent-first tech news: ranked story clusters, coverage and discussion links, trends, and events. | vendor's own |
| TensorFeed tensorfeed.ai | MCP server | AI news, model pricing, service status, and machine-payable premium tools. AFTA-certified. | vendor's own |
| TickerDB tickerdb.com | MCP server | Pre-computed market data that improves agent reasoning, reduces token usage, and replaces pipelines. | vendor's own |
| TracePass tracepass.eu | MCP server | Manage products, EU Digital Product Passports, operator parties, and GS1 EPCIS supply-chain events. | vendor's own |
| Trade It tradeit.app | MCP server | Trade stock, crypto, and options on Robinhood, ETrade, Webull, Charles Schwab, Coinbase, or Kraken. | vendor's own |
The first 60 of 67, most used first. All 67 are in this page's JSON twin and, with their facts, in /api/v1/indexed.json (category).
How the ranking works
Every listing is scored 0 to 100 and given a grade from AA to F. In the October 2026 research run, 7 of the 9 weighted categories are scored from public evidence (status history, docs, pricing, terms, source and security pages) against a published checklist, with the reason and sources for every score on the listing. Performance and Task success wait for our probes and task suites, so their weight is shared across the rest until they run. Negative events deduct up to 15 points. Read the methodology.
For companies
Do agents find, use and choose your tools?
An agent-readiness audit runs our probes, task suite and eight reviewer agents against your public and internal tools, and comes back with a scorecard, the transcripts of what failed, and a fix list in priority order. From $2,500, re-run included. We never take payment to move a rank. We do help companies earn one.