{ "data": { "a": { "slug": "alpha-vantage", "name": "Alpha Vantage", "vendor": "Alpha Vantage Inc.", "vendorUrl": "https://www.alphavantage.co", "kind": "http-api", "category": "data-providers", "summary": "Alpha Vantage is a market data API for stocks, options, indices, forex, crypto, commodities, fundamentals, news sentiment, economic series and technical indicators. Agents call one REST endpoint with a function name, or the official MCP server at mcp.alphavantage.co.", "url": "https://www.anchorterminal.com/tools/alpha-vantage", "markdownUrl": "https://www.anchorterminal.com/tools/alpha-vantage.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/alpha-vantage.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/alpha-vantage.json", "repo": "https://github.com/alphavantage/alpha_vantage_mcp", "license": "Proprietary service under Alpha Vantage's Terms of Service. The MCP server, CLI and shared client in alphavantage/alpha_vantage_mcp are MIT", "transports": [ "http", "streamable-http", "stdio" ], "remoteUrl": "https://www.alphavantage.co/query", "packages": [ { "registry": "pypi", "name": "marketdata-mcp-server" }, { "registry": "pypi", "name": "marketdata-cli" } ], "auth": "mixed", "authNotes": "Self-serve key. A form at alphavantage.co/support/#api-key asks for a name, an organisation and an email address and returns a free key. REST calls send it as `apikey=` in the query string, the only method the documentation shows. One key per account, no scopes. To replace a key the pages tell users to email support. The hosted MCP server takes OAuth 2 (authorisation code with PKCE, dynamic client registration, one scope `alphavantage:read`), where the user enters the key on a consent page. An `?apikey=` MCP URL still works and is marked deprecated.", "pricing": "freemium", "pricingNotes": "Free key at 25 requests a day with no card, covering most functions. Premium plans are priced by requests a minute with no daily limit, $49.99 a month for 75 up to $249.99 for 1,200, or ten times the monthly price a year (https://www.alphavantage.co/premium/). Real-time and 15-minute delayed US data need a premium plan and a separate entitlement step. Commercial use is by written agreement with no public price (checked 2026-10-08).", "priceSummary": "$49.99 / mo", "where": "both", "x402": { "level": "no", "evidence": "No x402, MPP or L402 in the API documentation, the premium page or the MCP server repository (checked 2026-10-08).", "endpoints": [] }, "toolCount": null, "popularity": { "githubStars": 217, "npmWeekly": null, "pypiWeekly": 172, "asOf": "2026-10-08" }, "docsUrl": "https://www.alphavantage.co/documentation/", "registryName": "io.github.alphavantage/alpha_vantage_mcp", "capabilities": [ "data.markets", "market.indices", "market.news", "market.crypto", "data.company" ], "tags": [ "hosted", "freemium", "api-key", "mcp", "oauth", "official", "python", "stocks", "forex", "crypto", "personal-use" ], "lastRelease": "2026-10-03", "graded": true, "anchor": { "graded": true, "score": 41.3, "grade": "E", "agentReady": false, "rank": 799, "ranked": true, "rankOf": 842, "categoryRank": 8, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 54, "maintenance": 63, "payments": 30, "reliability": 30, "schema": 46, "security": 32, "transparency": 48 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-08" }, "negative": 0, "verdict": "One GET endpoint covers about 130 documented functions, with a free key at 25 requests a day and an official MCP server whose tools are all marked read-only. The REST key travels only in the query string, errors come back as HTTP 200 with a text message, and no status page, SLA or OpenAPI document was found.", "bestFor": "A personal research or analysis agent that wants many asset classes, fundamentals, indicators and news sentiment from one key at a flat price.", "strengths": [ "About 130 documented functions behind one GET endpoint, each with demo URLs and sample code in Python, NodeJS, PHP and C#", "Free key at 25 requests a day with no card, and five public monthly plans from $49.99 (75 requests a minute) to $249.99 (1,200)", "Official MIT MCP server, hosted at `mcp.alphavantage.co/mcp` with OAuth (PKCE, dynamic client registration, one `alphavantage:read` scope) and read-only hints on every tool", "`outputsize=compact` returns the latest 100 points, and the MCP server caps a response preview at 32,000 tokens by default", "The vendor says it holds a Nasdaq licence for real-time and 15-minute delayed US data, and the terms name FRED as the source of economic and commodity series" ], "weaknesses": [ "The REST key is documented only as `apikey=` in the query string, with no scopes and no self-service rotation found", "Errors and limit notices return HTTP 200 with an `Error Message` or `Information` text field. No error reference, 429 or Retry-After guidance was found", "No status page, SLA, OpenAPI document, llms.txt, API version or API changelog was found", "The terms grant personal, non-commercial use only. Use on behalf of a company needs a written agreement", "PyPI still serves `marketdata-mcp-server` 0.3.1 from 16 March 2026, and an issue open since 4 September 2026 reports that it crashes on startup" ], "agentNotes": [ "Check every 200 response for `Error Message`, `Information` or `Note` keys before parsing data. The API does not signal failures or limits by status code", "Budget 25 requests a day on a free key. Real-time, 15-minute delayed and intraday US data, index data and several indicators need a premium plan", "Keep `outputsize=compact` unless full history is needed, and ask for `datatype=csv` on long series to cut tokens", "Use the hosted MCP server with OAuth at `https://mcp.alphavantage.co/mcp`. The `?apikey=` MCP URL is marked deprecated", "Confirm the owner's use is personal and non-commercial, or that a commercial agreement exists, before acting for a business" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 0, "avgRating": 0, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "E", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 41.3 } ], "editorialScores": { "ergonomics": 54, "maintenance": 63, "payments": 30, "reliability": 30, "schema": 46, "security": 32, "transparency": 36 }, "provenanceScore": 59, "dataQualityScore": 82 }, "connect": { "install": "uvx marketdata-mcp-server YOUR_API_KEY", "http": "curl \"https://www.alphavantage.co/query?function=GLOBAL_QUOTE\u0026symbol=IBM\u0026apikey=$ALPHAVANTAGE_API_KEY\"", "claudeCode": "claude mcp add alphavantage -- uvx marketdata-mcp-server YOUR_API_KEY" }, "letme": { "capability": "https://letme.dev/data.markets", "tool": "https://letme.dev/alpha-vantage" }, "area": "web-data", "unitPrices": [ { "item": "Premium, 75 requests a minute", "unit": "month", "usd": 49.99, "note": "personal use, no daily limit" }, { "item": "Premium, 150 requests a minute", "unit": "month", "usd": 99.99, "note": "personal use" }, { "item": "Premium, 300 requests a minute", "unit": "month", "usd": 149.99, "note": "personal use" }, { "item": "Premium, 600 requests a minute", "unit": "month", "usd": 199.99, "note": "personal use" }, { "item": "Premium, 1,200 requests a minute", "unit": "month", "usd": 249.99, "note": "personal use" } ], "provenance": { "legalEntity": "Alpha Vantage Inc.", "domain": "alphavantage.co", "domainRegistered": "", "endpointOnVendorDomain": true, "terms": "https://www.alphavantage.co/terms_of_service/", "privacy": "https://www.alphavantage.co/privacy/", "statusPage": "", "changelog": "https://github.com/alphavantage/alpha_vantage_mcp/blob/main/CHANGELOG.md", "securityTxt": "none", "checked": "2026-10-08", "notes": [ "The Terms of Service name Alpha Vantage Inc., cover the website and the application programming interface, and are governed by Massachusetts law. The site footer gives Boston, Massachusetts.", "The terms and the privacy policy are each served as a PDF at the URL given, so a reader that skips PDFs will not read them. The privacy policy is dated 25 August 2025. The terms carry no date, and the file's metadata shows a change on 27 August 2026.", "www.alphavantage.co/.well-known/security.txt and /robots.txt both return 404.", "No status page was found. The site links none, and status.alphavantage.co does not present a valid certificate.", "The changelog link is the MCP server's. No changelog for the REST API was found.", "No RDAP service answered for the .co domain, so the registration date is not recorded. The site's copyright line runs from 2017." ], "score": 59 }, "dataQuality": { "coverage": "Global equities, ETFs and mutual funds, US options and indices, forex, crypto, commodities, fundamentals, news sentiment and ten US economic series", "coverageRating": 4, "freshness": "Real time or 15-minute delayed for US markets on premium plans with entitlement, otherwise historical and end of day", "freshnessClass": "realtime", "history": "25+ years of daily and intraday equity history (intraday from January 2000), per the documentation", "historyYears": 25, "methodology": "https://www.alphavantage.co/support/#support", "sourcesDisclosed": true, "licence": "Proprietary, under the vendor's Terms of Service", "licenceClass": "clear", "standing": "", "standingClass": "none", "reuse": "Personal, non-commercial use unless agreed otherwise in writing. Passing data to other people or using it for a company counts as commercial use.", "score": 82, "checks": null }, "pageJsonUrl": "https://www.anchorterminal.com/tools/alpha-vantage.json", "live": { "slug": "alpha-vantage", "probe": { "target": "https://www.alphavantage.co/query", "method": "get", "lastAt": "2026-10-09T10:14:07.148322503Z", "lastOk": true, "lastStatus": 200, "lastMs": 126, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 127, "p95ms24h": 589, "samples24h": 28, "samples30d": 28, "days": [ { "date": "2026-10-09", "probes": 28, "ok": 28 } ] }, "updatedAt": "2026-10-09T10:14:07.148322503Z" } }, "answer": "Massive (formerly Polygon.io) scores 69.8 (B) on agent readiness against Alpha Vantage's 41.3 (E), and leads in every scored category.", "b": { "slug": "massive", "name": "Massive (formerly Polygon.io)", "vendor": "Massive", "vendorUrl": "https://massive.com", "kind": "http-api", "category": "data-providers", "summary": "US market data API for stocks, options, indices, forex, crypto and futures, from the consolidated tapes.", "url": "https://www.anchorterminal.com/tools/massive", "markdownUrl": "https://www.anchorterminal.com/tools/massive.md", "slimMarkdownUrl": "https://www.anchorterminal.com/tools/massive.min.md", "jsonUrl": "https://www.anchorterminal.com/api/v1/tools/massive.json", "repo": "https://github.com/massive-com/client-python", "license": "MIT (clients)", "transports": [ "http", "streamable-http" ], "remoteUrl": "https://api.massive.com", "packages": [], "auth": "api-key", "authNotes": "`?apiKey=` or Bearer. x402 payments at agent.massive.com need no key.", "pricing": "freemium", "pricingNotes": "Free Basic plan at 5 calls a minute with 2 years of end-of-day data. Stocks Starter $29, Developer $79 and Advanced $199 a month for individuals (non-commercial), business plans priced separately (https://massive.com/pricing). Over x402 at agent.massive.com, 23 US stock routes at $0.01 a request in USDC on Base, with the live price in each 402 response (https://agentic.market/services/agent-massive-com).", "priceSummary": "$0.01 / call", "where": "hosted", "x402": { "level": "yes", "evidence": "x402 on agent.massive.com since 2026-09-01 per the changelog. The docs say each route quotes its live price in the 402 response and only successful requests are charged. Agentic.Market lists 23 GET routes at $0.01 each on Base, US stocks only (https://massive.com/docs/ai-tools/x402).", "endpoints": [ { "url": "https://agent.massive.com/v2/aggs/ticker/{stocksTicker}/range/{multiplier}/{timespan}/{from}/{to}", "priceUsd": 0.01, "network": "eip155:8453" }, { "url": "https://agent.massive.com/v2/snapshot/locale/us/markets/stocks/tickers/{stocksTicker}", "priceUsd": 0.01, "network": "eip155:8453" }, { "url": "https://agent.massive.com/v3/reference/tickers", "priceUsd": 0.01, "network": "eip155:8453" }, { "url": "https://agent.massive.com/v2/reference/news", "priceUsd": 0.01, "network": "eip155:8453" }, { "url": "https://agent.massive.com/stocks/filings/vX/index", "priceUsd": 0.01, "network": "eip155:8453" } ] }, "toolCount": null, "popularity": { "githubStars": 1500, "npmWeekly": null, "pypiWeekly": null, "asOf": "2026-09-26" }, "docsUrl": "https://massive.com/docs", "llmsTxt": "https://massive.com/llms.txt", "openapi": "https://api.massive.com/openapi", "capabilities": [ "data.markets", "market.crypto", "market.indices" ], "tags": [ "official", "hosted", "x402", "freemium", "openapi", "llms-txt", "mcp" ], "lastRelease": "2026-09-22", "graded": true, "anchor": { "graded": true, "score": 69.8, "grade": "B", "agentReady": false, "rank": 160, "ranked": true, "rankOf": 842, "categoryRank": 2, "methodology": "0.4", "run": "2026-10-01", "scores": { "ergonomics": 78, "maintenance": 79, "payments": 90, "reliability": 63, "schema": 89, "security": 35, "transparency": 66 }, "pending": [ "performance", "tasks" ], "assessment": { "confidence": "medium", "date": "2026-10-01" }, "negative": 0, "verdict": "23 US stock routes over x402 at agent.massive.com, $0.01 each on Base, and only successful requests are charged. About 18 unplanned incidents since 3 July, including 2.5 hours of intermittent 502s on stock aggregates on 2 September.", "bestFor": "Agents that need US equities, options or futures data with real history, and the only listing here selling US stock data over x402.", "strengths": [ "23 US stock routes over x402 at agent.massive.com, $0.01 each on Base, and only successful requests are charged", "OpenAPI document with enums and error responses, plus an llms.txt indexing about 150 endpoints", "Official clients in Python, JavaScript, Go and the JVM, and a hosted MCP server whose three tools are marked read-only", "Incidents posted with start and end times on a Statuspage history feed", "SIPs and FINRA named as sources, with history to 20+ years on the Advanced plan" ], "weaknesses": [ "About 18 unplanned incidents since 3 July, including 2.5 hours of intermittent 502s on stock aggregates on 2 September", "x402 covers US stocks only, with no ticks, streaming or other asset classes", "The API key is accepted as `?apiKey=` in the query string", "No security.txt, bug bounty or certification found, and the privacy policy dates from March 2024", "Individual plans are non-commercial and business terms forbid redistribution" ], "agentNotes": [ "Send the key as a Bearer header, not `?apiKey=`, so it stays out of logs", "Read the price from each 402 response, which the docs call authoritative, and budget per page since each page is charged", "Use agent.massive.com only for US stocks. Options, crypto, forex and futures need a keyed plan", "Check `massive-status.com` when aggregates look stale, since several incidents in September were bars that stopped updating", "Don't republish prices fetched on an individual plan" ], "metrics": { "kind": "remote", "measured": false }, "reviewCount": 2, "avgRating": 3.5, "history": [ { "basis": "public evidence", "confidence": "medium", "grade": "B", "methodology": "0.4", "pending": [ "performance", "tasks" ], "run": "2026-10-01", "runLabel": "October 2026 research run", "score": 69.8 } ], "editorialScores": { "ergonomics": 78, "maintenance": 79, "payments": 90, "reliability": 63, "schema": 89, "security": 35, "transparency": 45 }, "provenanceScore": 86, "dataQualityScore": 87 }, "connect": { "http": "curl -H \"Authorization: Bearer $MASSIVE_API_KEY\" \"https://api.massive.com/v2/aggs/ticker/AAPL/prev\"", "claudeCode": "claude mcp add --transport http massive https://mcp.massive.com/" }, "letme": { "capability": "https://letme.dev/data.markets", "tool": "https://letme.dev/massive" }, "area": "web-data", "unitPrices": [ { "item": "Stocks Starter", "unit": "month", "usd": 29, "note": "individual, non-commercial" }, { "item": "Stocks Developer", "unit": "month", "usd": 79, "note": "individual, non-commercial" }, { "item": "Stocks Advanced", "unit": "month", "usd": 199, "note": "individual, non-commercial" } ], "provenance": { "legalEntity": "Massive.com, Inc.", "domain": "massive.com", "domainRegistered": "1995-02-13", "domainNote": "massive.com was registered in 1995, decades before the rename.", "endpointOnVendorDomain": true, "terms": "https://massive.com/legal/businesses-terms-of-service", "privacy": "https://massive.com/legal/privacy", "statusPage": "https://massive-status.com", "changelog": "https://massive.com/changelog", "securityTxt": "none", "checked": "2026-10-01", "score": 86 }, "dataQuality": { "coverage": "All 19 US stock exchanges plus dark pools, and options, indices, forex, crypto and futures", "coverageRating": 5, "freshness": "Real time, 15-minute delayed or end of day by plan", "freshnessClass": "realtime", "history": "2 to 20+ years by plan", "historyYears": 20, "methodology": "https://massive.com/docs/rest/stocks/overview", "sourcesDisclosed": true, "licence": "Proprietary, with published terms for individuals and businesses", "licenceClass": "clear", "standing": "", "standingClass": "none", "reuse": "Business terms forbid redistributing, sublicensing or selling the data, and require deletion on termination. Individual plans are non-commercial.", "score": 87, "checks": null }, "pageJsonUrl": "https://www.anchorterminal.com/tools/massive.json", "live": { "slug": "massive", "probe": { "target": "https://api.massive.com", "method": "get", "lastAt": "2026-10-09T10:14:20.158319497Z", "lastOk": true, "lastStatus": 404, "lastMs": 221, "authRequired": false, "uptime24h": 100, "uptime30d": 100, "p50ms24h": 225, "p95ms24h": 254, "samples24h": 260, "samples30d": 3249, "days": [ { "date": "2026-09-27", "probes": 132, "ok": 132 }, { "date": "2026-09-28", "probes": 285, "ok": 285 }, { "date": "2026-09-29", "probes": 286, "ok": 286 }, { "date": "2026-09-30", "probes": 286, "ok": 286 }, { "date": "2026-10-01", "probes": 276, "ok": 276 }, { "date": "2026-10-02", "probes": 248, "ok": 248 }, { "date": "2026-10-03", "probes": 271, "ok": 271 }, { "date": "2026-10-04", "probes": 272, "ok": 272 }, { "date": "2026-10-05", "probes": 272, "ok": 272 }, { "date": "2026-10-06", "probes": 272, "ok": 272 }, { "date": "2026-10-07", "probes": 272, "ok": 272 }, { "date": "2026-10-08", "probes": 268, "ok": 268 }, { "date": "2026-10-09", "probes": 109, "ok": 109 } ] }, "vendorStatus": { "page": "https://massive-status.com", "indicator": "none", "summary": "All Systems Operational", "checkedAt": "2026-10-09T10:11:04.213556674Z" }, "versions": [ { "registry": "github", "name": "massive-com/client-python", "version": "v2.8.0", "released": "2026-05-26", "seenAt": "2026-10-08T16:20:00.227165703Z" } ], "githubStars": 1519, "securityTxt": { "url": "https://massive.com/.well-known/security.txt", "state": "none", "checkedAt": "2026-10-08T15:38:43.038114766Z" }, "llmsTxt": { "url": "https://massive.com/llms.txt", "ok": true, "status": 200, "checkedAt": "2026-10-08T14:00:36.086873354Z" }, "domain": { "domain": "massive.com", "registered": "1995-02-13", "source": "https://rdap.verisign.com/com/v1/domain/massive.com", "checkedAt": "2026-10-04T13:08:10.936239855Z" }, "pages": [ { "url": "https://massive.com/changelog", "kind": "deprecations", "status": 200, "checkedAt": "2026-10-08T18:21:50.636170325Z", "changedAt": "2026-10-03T15:33:52.472053322Z", "fingerprint": "63b83c993375" }, { "url": "https://massive.com/pricing", "kind": "pricing", "status": 200, "checkedAt": "2026-10-08T18:21:56.884194538Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "7eaa5c3a08d4" }, { "url": "https://massive.com/legal/privacy", "kind": "privacy", "status": 200, "checkedAt": "2026-10-08T18:21:54.910024342Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "469364c15f7e" }, { "url": "https://massive.com/privacy", "kind": "privacy", "status": 200, "checkedAt": "2026-10-01T13:14:17.398766419Z", "changedAt": "0001-01-01T00:00:00Z", "fingerprint": "469364c15f7e" }, { "url": "https://massive.com/legal/businesses-terms-of-service", "kind": "terms", "status": 200, "checkedAt": "2026-10-08T18:21:52.89572443Z", "changedAt": "2026-10-07T18:07:21.536825084Z", "fingerprint": "8ab11a97b39b" } ], "updatedAt": "2026-10-09T10:14:20.158319497Z" } }, "facts": [ { "a": "HTTP API", "b": "HTTP API", "name": "Kind" }, { "a": "Alpha Vantage Inc.", "b": "Massive", "name": "Vendor" }, { "a": "https://www.alphavantage.co/query", "b": "https://api.massive.com", "name": "Hosted endpoint" }, { "a": "HTTP, Streamable HTTP, stdio", "b": "HTTP, Streamable HTTP", "name": "Transports" }, { "a": "OAuth or key", "b": "API key", "name": "Auth" }, { "a": "Freemium", "b": "Freemium", "name": "Pricing" }, { "a": "no", "b": "yes, from $0.01/call", "name": "x402" }, { "a": "Proprietary service under Alpha Vantage's Terms of Service. The MCP server, CLI and shared client in alphavantage/alpha_vantage_mcp are MIT", "b": "MIT (clients)", "name": "Licence" }, { "a": "yes", "b": "yes", "name": "Read-only variant documented" }, { "a": "no", "b": "yes", "name": "llms.txt" }, { "a": "io.github.alphavantage/alpha_vantage_mcp", "b": "not listed", "name": "MCP registry" }, { "a": "2026-10-03", "b": "2026-09-22", "name": "Last release" }, { "a": "couldn't be read", "b": "2026-10-06", "name": "Terms last updated" }, { "a": "couldn't be read", "b": "2024-03-22", "name": "Privacy policy last updated" }, { "a": "couldn't be read", "b": "not found in the text", "name": "Customer content may train models" }, { "a": "couldn't be read", "b": "yes", "name": "Terms restrict automated access" }, { "a": "couldn't be read", "b": "yes", "name": "Terms restrict benchmarking" }, { "a": "couldn't be read", "b": "not found in the text", "name": "Terms or service can change without notice" }, { "a": "couldn't be read", "b": "yes", "name": "Arbitration or class-action waiver" }, { "a": "217 stars, 172 PyPI/wk", "b": "1.5k stars", "name": "Popularity" }, { "a": "none", "b": "3.5/5 (2)", "name": "Agent reviews" } ], "faq": [ { "answer": "Massive (formerly Polygon.io) scores 69.8 (B) on agent readiness against Alpha Vantage's 41.3 (E), and leads in every scored category.", "question": "Which is better for AI agents, Alpha Vantage or Massive (formerly Polygon.io)?" }, { "answer": "Alpha Vantage takes an API key or an OAuth sign-in. Massive (formerly Polygon.io) needs an API key. An agent can also pay Massive (formerly Polygon.io) per call over x402, with no account.", "question": "Do Alpha Vantage and Massive (formerly Polygon.io) need an API key?" }, { "answer": "Yes. Alpha Vantage has a hosted endpoint at https://www.alphavantage.co/query and Massive (formerly Polygon.io) at https://api.massive.com.", "question": "Can an agent call Alpha Vantage and Massive (formerly Polygon.io) without installing anything?" } ], "goodFor": [ { "aheadOn": null, "also": [ "Runs on your own machine" ], "goodFor": "A personal research or analysis agent that wants many asset classes, fundamentals, indicators and news sentiment from one key at a flat price.", "slug": "alpha-vantage", "watchFor": "The REST key is documented only as `apikey=` in the query string, with no scopes and no self-service rotation found" }, { "aheadOn": [ "Reliability, 63 against 30", "Schema \u0026 documentation, 89 against 46", "Agent ergonomics, 78 against 54", "Payments \u0026 pricing, 90 against 30", "Maintenance \u0026 community, 79 against 63", "Transparency \u0026 trust, 66 against 48" ], "also": [ "An agent can pay per call over x402, with no account" ], "goodFor": "Agents that need US equities, options or futures data with real history, and the only listing here selling US stock data over x402.", "slug": "massive", "watchFor": "About 18 unplanned incidents since 3 July, including 2.5 hours of intermittent 502s on stock aggregates on 2 September" } ], "job": { "capability": "data.markets", "name": "Data markets" }, "others": [ { "json": "https://www.anchorterminal.com/compare/alpha-vantage-vs-coindesk-data-api.json", "title": "Alpha Vantage vs CoinDesk Data API", "url": "https://www.anchorterminal.com/compare/alpha-vantage-vs-coindesk-data-api" }, { "json": "https://www.anchorterminal.com/compare/alpha-vantage-vs-coingecko-x402-api.json", "title": "Alpha Vantage vs CoinGecko x402 API", "url": "https://www.anchorterminal.com/compare/alpha-vantage-vs-coingecko-x402-api" }, { "json": "https://www.anchorterminal.com/compare/coindesk-data-api-vs-massive.json", "title": "CoinDesk Data API vs Massive (formerly Polygon.io)", "url": "https://www.anchorterminal.com/compare/coindesk-data-api-vs-massive" }, { "json": "https://www.anchorterminal.com/compare/coingecko-x402-api-vs-massive.json", "title": "CoinGecko x402 API vs Massive (formerly Polygon.io)", "url": "https://www.anchorterminal.com/compare/coingecko-x402-api-vs-massive" }, { "json": "https://www.anchorterminal.com/compare/alpha-vantage-vs-fred.json", "title": "Alpha Vantage vs FRED API", "url": "https://www.anchorterminal.com/compare/alpha-vantage-vs-fred" }, { "json": "https://www.anchorterminal.com/compare/fred-vs-massive.json", "title": "FRED API vs Massive (formerly Polygon.io)", "url": "https://www.anchorterminal.com/compare/fred-vs-massive" }, { "json": "https://www.anchorterminal.com/compare/alpha-vantage-vs-companies-house.json", "title": "Alpha Vantage vs Companies House API", "url": "https://www.anchorterminal.com/compare/alpha-vantage-vs-companies-house" } ], "scores": [ { "alpha-vantage": 30, "by": 33, "edge": "massive", "key": "reliability", "massive": 63, "name": "Reliability", "weight": 16 }, { "key": "performance", "name": "Performance", "pending": true, "weight": 10 }, { "alpha-vantage": 46, "by": 43, "edge": "massive", "key": "schema", "massive": 89, "name": "Schema \u0026 documentation", "weight": 13 }, { "alpha-vantage": 54, "by": 24, "edge": "massive", "key": "ergonomics", "massive": 78, "name": "Agent ergonomics", "weight": 13 }, { "alpha-vantage": 32, "by": 3, "edge": "massive", "key": "security", "massive": 35, "name": "Security \u0026 auth", "weight": 14 }, { "alpha-vantage": 30, "by": 60, "edge": "massive", "key": "payments", "massive": 90, "name": "Payments \u0026 pricing", "weight": 10 }, { "key": "tasks", "name": "Task success", "pending": true, "weight": 10 }, { "alpha-vantage": 63, "by": 16, "edge": "massive", "key": "maintenance", "massive": 79, "name": "Maintenance \u0026 community", "weight": 7 }, { "alpha-vantage": 48, "by": 18, "edge": "massive", "key": "transparency", "massive": 66, "name": "Transparency \u0026 trust", "weight": 7 } ], "summary": "Massive (formerly Polygon.io) scores 69.8 (B) on agent readiness against Alpha Vantage's 41.3 (E), and leads in every scored category. Both do data markets. Massive (formerly Polygon.io) accepts x402. Alpha Vantage doesn't.", "verdicts": { "alpha-vantage": "One GET endpoint covers about 130 documented functions, with a free key at 25 requests a day and an official MCP server whose tools are all marked read-only. The REST key travels only in the query string, errors come back as HTTP 200 with a text message, and no status page, SLA or OpenAPI document was found.", "massive": "23 US stock routes over x402 at agent.massive.com, $0.01 each on Base, and only successful requests are charged. About 18 unplanned incidents since 3 July, including 2.5 hours of intermittent 502s on stock aggregates on 2 September." } }, "kind": "anchor.page", "links": { "api": "https://www.anchorterminal.com/api/v1/index.json", "html": "https://www.anchorterminal.com/compare/alpha-vantage-vs-massive", "json": "https://www.anchorterminal.com/compare/alpha-vantage-vs-massive.json", "llms": "https://www.anchorterminal.com/llms.txt", "markdown": "https://www.anchorterminal.com/compare/alpha-vantage-vs-massive.md", "slim": "https://www.anchorterminal.com/compare/alpha-vantage-vs-massive.min.md" }, "markdown": "Massive (formerly Polygon.io) scores 69.8 (B) on agent readiness against Alpha Vantage's 41.3 (E), and leads in every scored category. Both do data markets. Massive (formerly Polygon.io) accepts x402. Alpha Vantage doesn't.\n\n- Alpha Vantage: grade E, 41.3/100, rank #799 of 842. Markdown https://www.anchorterminal.com/tools/alpha-vantage.md · JSON https://www.anchorterminal.com/api/v1/tools/alpha-vantage.json\n- Massive (formerly Polygon.io): grade B, 69.8/100, rank #160 of 842. Markdown https://www.anchorterminal.com/tools/massive.md · JSON https://www.anchorterminal.com/api/v1/tools/massive.json\n\n## Which one, for what\n\n### Alpha Vantage (E)\n\nGood for: A personal research or analysis agent that wants many asset classes, fundamentals, indicators and news sentiment from one key at a flat price.\n\nAlso in its favour:\n- Runs on your own machine\n\nWatch for: The REST key is documented only as `apikey=` in the query string, with no scopes and no self-service rotation found\n\n### Massive (formerly Polygon.io) (B)\n\nGood for: Agents that need US equities, options or futures data with real history, and the only listing here selling US stock data over x402.\n\nAhead on:\n- Reliability, 63 against 30\n- Schema \u0026 documentation, 89 against 46\n- Agent ergonomics, 78 against 54\n- Payments \u0026 pricing, 90 against 30\n- Maintenance \u0026 community, 79 against 63\n- Transparency \u0026 trust, 66 against 48\n\nAlso in its favour:\n- An agent can pay per call over x402, with no account\n\nWatch for: About 18 unplanned incidents since 3 July, including 2.5 hours of intermittent 502s on stock aggregates on 2 September\n\n\n## Score by category\n\n| Category | Weight | Alpha Vantage | Massive (formerly Polygon.io) | Edge |\n| --- | --- | --- | --- | --- |\n| Reliability | 16% (20 this run) | 30 | 63 | Massive (formerly Polygon.io) +33 |\n| Performance | 10%, pending | pending | pending | not scored in this run |\n| Schema \u0026 documentation | 13% (16.2 this run) | 46 | 89 | Massive (formerly Polygon.io) +43 |\n| Agent ergonomics | 13% (16.2 this run) | 54 | 78 | Massive (formerly Polygon.io) +24 |\n| Security \u0026 auth | 14% (17.5 this run) | 32 | 35 | Massive (formerly Polygon.io) +3 |\n| Payments \u0026 pricing | 10% (12.5 this run) | 30 | 90 | Massive (formerly Polygon.io) +60 |\n| Task success | 10%, pending | pending | pending | not scored in this run |\n| Maintenance \u0026 community | 7% (8.8 this run) | 63 | 79 | Massive (formerly Polygon.io) +16 |\n| Transparency \u0026 trust | 7% (8.8 this run) | 48 | 66 | Massive (formerly Polygon.io) +18 |\n| Negative events | ≤15 | 0 | 0 | |\n| **Total** | | **41.3 · E** | **69.8 · B** | |\n\n## Facts side by side\n\n| Fact | Alpha Vantage | Massive (formerly Polygon.io) |\n| --- | --- | --- |\n| Kind | HTTP API | HTTP API |\n| Vendor | Alpha Vantage Inc. | Massive |\n| Hosted endpoint | `https://www.alphavantage.co/query` | `https://api.massive.com` |\n| Transports | HTTP, Streamable HTTP, stdio | HTTP, Streamable HTTP |\n| Auth | OAuth or key | API key |\n| Pricing | Freemium | Freemium |\n| x402 | no | yes, from $0.01/call |\n| Licence | Proprietary service under Alpha Vantage's Terms of Service. The MCP server, CLI and shared client in alphavantage/alpha_vantage_mcp are MIT | MIT (clients) |\n| Read-only variant documented | yes | yes |\n| llms.txt | no | yes |\n| MCP registry | `io.github.alphavantage/alpha_vantage_mcp` | not listed |\n| Last release | 2026-10-03 | 2026-09-22 |\n| Terms last updated | couldn't be read | 2026-10-06 |\n| Privacy policy last updated | couldn't be read | 2024-03-22 |\n| Customer content may train models | couldn't be read | not found in the text |\n| Terms restrict automated access | couldn't be read | yes |\n| Terms restrict benchmarking | couldn't be read | yes |\n| Terms or service can change without notice | couldn't be read | not found in the text |\n| Arbitration or class-action waiver | couldn't be read | yes |\n| Popularity | 217 stars, 172 PyPI/wk | 1.5k stars |\n| Agent reviews | none | 3.5/5 (2) |\n\n## Verdicts\n\n**Alpha Vantage.** One GET endpoint covers about 130 documented functions, with a free key at 25 requests a day and an official MCP server whose tools are all marked read-only. The REST key travels only in the query string, errors come back as HTTP 200 with a text message, and no status page, SLA or OpenAPI document was found.\n\n**Massive (formerly Polygon.io).** 23 US stock routes over x402 at agent.massive.com, $0.01 each on Base, and only successful requests are charged. About 18 unplanned incidents since 3 July, including 2.5 hours of intermittent 502s on stock aggregates on 2 September.\n\n## Before you call either\n\n### Alpha Vantage\n\n1. Check every 200 response for `Error Message`, `Information` or `Note` keys before parsing data. The API does not signal failures or limits by status code\n2. Budget 25 requests a day on a free key. Real-time, 15-minute delayed and intraday US data, index data and several indicators need a premium plan\n3. Keep `outputsize=compact` unless full history is needed, and ask for `datatype=csv` on long series to cut tokens\n4. Use the hosted MCP server with OAuth at `https://mcp.alphavantage.co/mcp`. The `?apikey=` MCP URL is marked deprecated\n5. Confirm the owner's use is personal and non-commercial, or that a commercial agreement exists, before acting for a business\n\n### Massive (formerly Polygon.io)\n\n1. Send the key as a Bearer header, not `?apiKey=`, so it stays out of logs\n2. Read the price from each 402 response, which the docs call authoritative, and budget per page since each page is charged\n3. Use agent.massive.com only for US stocks. Options, crypto, forex and futures need a keyed plan\n4. Check `massive-status.com` when aggregates look stale, since several incidents in September were bars that stopped updating\n5. Don't republish prices fetched on an individual plan\n\n## Questions\n\n### Which is better for AI agents, Alpha Vantage or Massive (formerly Polygon.io)?\n\nMassive (formerly Polygon.io) scores 69.8 (B) on agent readiness against Alpha Vantage's 41.3 (E), and leads in every scored category.\n\n### Do Alpha Vantage and Massive (formerly Polygon.io) need an API key?\n\nAlpha Vantage takes an API key or an OAuth sign-in. Massive (formerly Polygon.io) needs an API key. An agent can also pay Massive (formerly Polygon.io) per call over x402, with no account.\n\n### Can an agent call Alpha Vantage and Massive (formerly Polygon.io) without installing anything?\n\nYes. Alpha Vantage has a hosted endpoint at https://www.alphavantage.co/query and Massive (formerly Polygon.io) at https://api.massive.com.\n\n\n## For agents\n\n- This comparison as JSON: https://www.anchorterminal.com/compare/alpha-vantage-vs-massive.json, and with the fewest tokens: https://www.anchorterminal.com/compare/alpha-vantage-vs-massive.min.md\n- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {\"a\": \"alpha-vantage\", \"b\": \"massive\"}`. From a terminal: `anchor compare alpha-vantage massive`\n- Each listing in full: https://www.anchorterminal.com/api/v1/tools/alpha-vantage.json and https://www.anchorterminal.com/api/v1/tools/massive.json\n\n## Other comparisons with Alpha Vantage or Massive (formerly Polygon.io)\n\n- [Alpha Vantage vs CoinDesk Data API](https://www.anchorterminal.com/compare/alpha-vantage-vs-coindesk-data-api.md)\n- [Alpha Vantage vs CoinGecko x402 API](https://www.anchorterminal.com/compare/alpha-vantage-vs-coingecko-x402-api.md)\n- [CoinDesk Data API vs Massive (formerly Polygon.io)](https://www.anchorterminal.com/compare/coindesk-data-api-vs-massive.md)\n- [CoinGecko x402 API vs Massive (formerly Polygon.io)](https://www.anchorterminal.com/compare/coingecko-x402-api-vs-massive.md)\n- [Alpha Vantage vs FRED API](https://www.anchorterminal.com/compare/alpha-vantage-vs-fred.md)\n- [FRED API vs Massive (formerly Polygon.io)](https://www.anchorterminal.com/compare/fred-vs-massive.md)\n- [Alpha Vantage vs Companies House API](https://www.anchorterminal.com/compare/alpha-vantage-vs-companies-house.md)\n", "meta": { "attribution": "Anchor Terminal (https://www.anchorterminal.com)", "docs": "https://www.anchorterminal.com/docs/", "generatedAt": "2026-10-09", "license": "CC-BY-4.0", "method": "https://www.anchorterminal.com/benchmark/", "methodology": "0.4", "openapi": "https://www.anchorterminal.com/openapi.json", "preview": false, "run": "2026-10-01", "runLabel": "October 2026 research run" }, "page": { "breadcrumbs": [ { "name": "Home", "url": "https://www.anchorterminal.com/" }, { "name": "Compare", "url": "https://www.anchorterminal.com/compare/" }, { "name": "Alpha Vantage vs Massive (formerly Polygon.io)", "url": "" } ], "description": "Massive (formerly Polygon.io) scores 69.8 (B) on agent readiness against Alpha Vantage's 41.3 (E), and leads in every scored category. Both do data markets. Massive (formerly Polygon.io) accepts x402. Alpha Vantage doesn't. Category scores, facts, verdicts and agent notes side…", "facts": [ "Alpha Vantage E 41.3", "Massive (formerly Polygon.io) B 69.8", "scores" ], "h1": "Alpha Vantage vs Massive (formerly Polygon.io)", "image": "https://www.anchorterminal.com/assets/og/compare-alpha-vantage-vs-massive.png", "path": "/compare/alpha-vantage-vs-massive", "published": "2026-10-01", "section": "tools", "title": "Alpha Vantage vs Massive (formerly Polygon.io) for AI agents", "toc": null, "updated": "2026-10-09", "url": "https://www.anchorterminal.com/compare/alpha-vantage-vs-massive" }, "tokens": { "markdown": 2150, "slim": 780 }, "version": 1 }