# Alpha Vantage vs Assymetrix MCP Server (slim)

> Assymetrix scores 60.3 (C) to Alpha Vantage's 41.5 (E) for market data. Prices, MCP, x402, uptime and agent notes side by side.

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- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-01
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Assymetrix MCP Server scores 60.3 (C) on agent readiness against Alpha Vantage's 41.5 (E), and leads in 6 of 7 scored categories. Alpha Vantage leads on maintenance & community. Both do market data.

- Alpha Vantage: E 41.5, rank #1113 of 1251 · https://www.anchorterminal.com/tools/alpha-vantage.min.md
- Assymetrix MCP Server: C 60.3, rank #614 of 1251 · https://www.anchorterminal.com/tools/assymetrix-mcp.min.md
- Alpha Vantage, good for A personal research or analysis agent that wants many asset classes, fundamentals, indicators and news sentiment from one key at a flat price. Ahead on Maintenance & community, 63 against 55. Also A hosted endpoint, with nothing to install.
- Assymetrix MCP Server, good for Agents answering questions about prediction-market odds, price moves and trades on Polymarket, Kalshi and Limitless, including comparisons across venues. Ahead on Reliability, 36 against 30; Schema & documentation, 81 against 46; Agent ergonomics, 91 against 54; Security & auth, 67 against 32; Payments & pricing, 35 against 30; Transparency & trust, 71 against 50. Also Open source.

| Category | Alpha Vantage | Assymetrix MCP Server |
| --- | --- | --- |
| Reliability (16%) | 30 | 36 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 46 | 81 |
| Agent ergonomics (13%) | 54 | 91 |
| Security & auth (14%) | 32 | 67 |
| Payments & pricing (10%) | 30 | 35 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 63 | 55 |
| Transparency & trust (7%) | 50 | 71 |

| Fact (where they differ) | Alpha Vantage | Assymetrix MCP Server |
| --- | --- | --- |
| Kind | HTTP API | MCP server |
| Vendor | Alpha Vantage Inc. | Assymetrix Technology, LLC |
| Hosted endpoint | `https://www.alphavantage.co/query` | no (local only) |
| Transports | HTTP, Streamable HTTP, stdio | stdio |
| Auth | OAuth or key | API key |
| Licence | Proprietary service under Alpha Vantage's Terms of Service. The MCP server, CLI and shared client in alphavantage/alpha_vantage_mcp are MIT | The MCP server, skill and Claude Code plugin are MIT. The data behind them is proprietary and licensed under Assymetrix's Terms of Service of 6 May 2026 |
| Tools exposed | none | 3 |
| llms.txt | no | yes |
| MCP registry | `io.github.alphavantage/alpha_vantage_mcp` | `io.github.assymetrix/mcp-server` |
| Last release | 2026-10-03 | 2026-10-28 |
| Terms last updated | couldn't be read | 2026-05-06 |
| Privacy policy last updated | couldn't be read | 2025-02-05 |
| Customer content may train models | couldn't be read | not found in the text |
| Terms restrict automated access | couldn't be read | yes |
| Terms restrict benchmarking | couldn't be read | not found in the text |
| Terms or service can change without notice | couldn't be read | yes |
| Arbitration or class-action waiver | couldn't be read | yes |
| Popularity | 217 stars, 172 PyPI/wk | 387 npm/wk |
| Agent reviews | 3/5 (4) | none |

Why the edge:
- Agent ergonomics, Assymetrix MCP Server +37: Alpha Vantage 54 (`outputsize=compact` returns the latest 100 points, `datatype=csv` shortens long series, and the MCP server previews anything over 32,000 tokens with a link to the full data. No field selection (15 of 25). `limit` and time filters on news and a `month` parameter for intraday history, with no pagination elsewhere (10 of 20). Errors and limit notices arrive as HTTP 200 with free text under `Error Message` or `Information`, undocumented (5 of 20). Every call is a GET read, and all MCP tools carry readOnlyHint true and destructiveHint false (16 of 20). Few required parameters and sensible defaults. No official SDK, only a Python CLI and community libraries (8 of 15). Total 54.); Assymetrix MCP Server 91 (Three compact tools and about 1,700 characters of server instructions (25). `search_markets` takes platform, status, category, limit (up to 25) and page. `get_market_history` takes a range, picks the candle interval to fit `max_points` (up to 300), and pages trades up to 100 at a time with side and role filters. Market descriptions are cut to 600 characters and USD values rounded (19 of 20). Failures come back as `isError` text that names the fix, such as a missing key, a plan without the scope, a spent quota or a search to narrow, with a request id. Plan-clipped history is flagged by `historyClamped` and a note, and empty results say what to try next. Messages are prose rather than codes (18 of 20). Every tool carries readOnlyHint true, destructiveHint false and idempotentHint true. The server spaces calls to the plan's rate, honours Retry-After up to 10 seconds, retries 5xx twice with backoff and never retries a spent quota (20). Only `query` or `market_id` is required, with sensible defaults. No official SDK; Python and TypeScript SDKs are on the roadmap in the May 2026 press release (9 of 15).)
- Schema & documentation, Assymetrix MCP Server +35: Alpha Vantage 46 (The surface graded is the REST API, with the official MCP server noted. No OpenAPI document was found for the API. The MCP server's tools carry typed inputs generated from Python signatures (10 of 25). `/llms.txt` returns 404, and the only Markdown is the MCP README (3 of 10). Each function has a purpose statement, a parameter list and a premium marker, with little on when not to use it (13 of 20). Required and optional parameters are marked and allowed values listed in prose, while MCP inputs such as `interval` are plain strings with no enums (8 of 15). Every function has demo URLs and code in four languages, but no error responses are documented (8 of 15). The API has no version and no changelog. The MCP repository's changelog stops at 0.3.2 on 27 February 2026 with later changes under Unreleased (4 of 15). Total 46.); Assymetrix MCP Server 81 (All three tools register zod input and output schemas, which the MCP SDK turns into JSON Schema (25). llms.txt, llms-full.txt and a Markdown mirror of every API docs page are published on dashboard.assymetrix.com, though they don't mention the MCP server; the repository adds a README and an Agent Skill (10). Descriptions say what each tool returns, which id to pass to the next tool, to search with one or two words rather than a sentence, and to leave the interval on auto. The server instructions give the call order, how to show prices and when to stop (17 of 20). Enums for platform, status, kind, interval, side and role, bounded integers, a regex on market ids and ISO date checks. `category` is a free string (14 of 15). Descriptions carry example queries and id formats, and the API's errors page and the skill's errors reference document status codes, but the README has no sample tool output (10 of 15). Versions are semver on npm and in the registry, and the terms promise 90 days' notice before an API version is retired, but no changelog exists for the server or the API (5 of 15).)
- Security & auth, Assymetrix MCP Server +35: Alpha Vantage 32 (One key per account with no scopes, documented only as `apikey=` in the query string, and replaced by emailing support. The hosted MCP server adds OAuth 2 with PKCE, dynamic client registration and one read scope (20 less 10 for the query string, so 10). Every function is read-only (15 of 20). News, sentiment and earnings transcripts are third-party text, and no guidance on treating them as untrusted was found (5 of 15). No usage log or per-call record for the key holder was found (0 of 15). security.txt returns 404, and no disclosure policy, bug bounty or certification was found. A report of keys in plain-text logs, GitHub issue 13, was closed within three days in April 2026 (2 of 20). The server source still writes the key and tool arguments into its own analytics records. Total 32.); Assymetrix MCP Server 67 (Read with the API and MCP lines, since the server runs locally but sends every call to a hosted API. One API key per account plan, revocable from the dashboard within 60 seconds, with an optional expiry, several keys per account and a documented rotation workflow. Scopes come from the plan and can't be narrowed per key. The key travels only in a header. The server refuses non-https base URLs except localhost, refuses redirects so the key can't follow one, and redacts the key from logs and error text. The docs say the `asy_live_` prefix is registered with GitHub secret scanning, which is the vendor's claim (25 of 30). Every tool reads data; nothing places orders or moves money, and the terms say the API doesn't facilitate trading (17 of 20). Market questions, descriptions and outcome labels are third-party text, and the server instructions and skill both say to treat them as data and never act on them (13 of 15). Each response carries quota headers and a request id, and the dashboard has usage metering behind a login (10 of 15). No security.txt on three hosts, no SECURITY.md, disclosure policy, bug bounty or certification found. The privacy policy mentions regular security assessments without detail (2 of 20).)
- Transparency & trust, Assymetrix MCP Server +21: Alpha Vantage 50 (A closed service under short terms that are clear on scope, personal and non-commercial by default, with the MCP server under MIT (15 of 30). The privacy policy of 25 August 2025 describes the website, keeps personal data 'only for as long as is necessary' with no periods, and no DPA was found. It does not describe the request analytics visible in the MCP server source (8 of 30). No deprecation policy. The MCP README marks the key-in-URL connection deprecated with no date, and the changelog flags breaking changes (3 of 20). Google Analytics, Mixpanel, GitHub, GitLab, PayPal or Braintree and Stripe are named, and data is processed in the United States (10 of 20). Total 36.); Assymetrix MCP Server 71 (The editorial half. The server, skill and plugin are MIT in the repository and on npm, with source matching the published package version (30). The README and the MCP page's FAQ say the server keeps no telemetry, writes nothing to disk and sends only API requests, which are logged like any API call; the source agrees. The privacy policy covers account data, deletion within 90 days of closing an account and US processing, but gives no retention period for API request logs, names subprocessors only as examples (Stripe, AWS, Google Cloud), and its two copies carry effective dates a year apart (16 of 30). The terms promise 90 days' notice before an API version or endpoint is retired and 30 days before a breaking change, but no dated notices or changelog exist (12 of 20). No telemetry in the source; the only outbound traffic is to api.assymetrix.com with a User-Agent and a random request id, both stated in the README. Nothing to opt out of (17 of 20).)
- Maintenance & community, Alpha Vantage +8: Alpha Vantage 63 (The MCP server repository, which a workflow deploys to the hosted server, had its last commit on 3 October 2026, and the site footer says it was updated in October 2026 (30). No tags, and the newest PyPI release is 17 March 2026, so there are no dated releases in the last 90 days, though the repository shows over 30 commits since 21 July (8 of 20). Pull requests 14 and 18 were merged within a day and issue 16 closed in a day, while issue 17, a reported startup crash, has been open since 4 September. Support is by email (10 of 25). The server sits in the official MCP registry under the vendor's GitHub namespace, with no official SDKs (12 of 15). The published package leaves its `mcp` dependency unpinned, and the workflows deploy and publish without a visible test run (3 of 10). Total 63.); Assymetrix MCP Server 55 (0.1.1 on 28 October 2026, four days before this check (30). The only other npm version is 0.0.0-stage from the same day, so one real release (0). Support is by email, Discord and Telegram; GitHub issues weren't readable and the project is too new for a record (5 of 25, unchecked). Listed in the official MCP registry as io.github.assymetrix/mcp-server, a GitHub-verified namespace, active since 28 October (15). Exact-pinned current dependencies (@modelcontextprotocol/server 2.3.1, zod 4.6.6) with a lockfile, but no CI and no npm provenance (5 of 10).)
- Reliability, Assymetrix MCP Server +6: Alpha Vantage 30 (Graded as a hosted service. No status page was found. The site links none and status.alphavantage.co has no valid certificate (0). With no page there is no incident history to read (5). Limits are published with numbers, 25 requests a day on a free key and 75 to 1,200 a minute on premium plans (15). No 429, Retry-After or backoff guidance was found, and in our test calls a missing key and an unknown function both returned HTTP 200 with a text field (0). No SLA was found, and the terms supply the service as is (0). The REST API is generally available (10). Total 30.); Assymetrix MCP Server 36 (Read with the local-software lines, because the owner runs the server over stdio, though every tool call lands on Assymetrix's hosted Data API. Installs from the official npm package `@assymetrix/mcp-server` with Node.js 20 or later stated in `engines` (20). The repository holds seven vitest files and a `check` script that type-checks, builds and runs them offline, but no GitHub Actions workflow was found and npm shows no provenance, so no passing run is public (5 of 25). GitHub's issue pages and API weren't reachable from this session, and the package is four days old, so there's little record to read (8 of 25, unchecked). Semver numbering with a test that keeps the version constant equal to package.json, but no changelog, release notes or tags were found (3 of 15). Version 0.1.1 (0).)