# Eulerpool Financial Data API vs Twelve Data (slim)

> Twelve Data scores 70 (BB) to Eulerpool Financial Data's 46.2 (D) for market fundamentals. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/eulerpool-vs-twelve-data.md (~4,400 tokens) · this version ~2,630 tokens · JSON https://www.anchorterminal.com/compare/eulerpool-vs-twelve-data.json · canonical https://www.anchorterminal.com/compare/eulerpool-vs-twelve-data
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-07
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Twelve Data scores 70 (BB) on agent readiness against Eulerpool Financial Data API's 46.2 (D), and leads in 6 of 7 scored categories. Eulerpool Financial Data API leads on payments & pricing. Both do market fundamentals.

- Eulerpool Financial Data API: D 46.2, rank #1162 of 1486 · https://www.anchorterminal.com/tools/eulerpool.min.md
- Twelve Data: BB 70, rank #217 of 1486 · https://www.anchorterminal.com/tools/twelve-data.min.md
- Eulerpool Financial Data API, good for Broad fundamentals, estimates and macro for research agents, close to financial-modeling-prep, eodhd and alpha-vantage. Ahead on Payments & pricing, 40 against 30.
- Twelve Data, good for Agents that need prices and time series across many exchanges and asset classes with one contract, CSV output, and a documented error table. Ahead on Reliability, 83 against 40; Schema & documentation, 83 against 53; Agent ergonomics, 84 against 48; Security & auth, 54 against 35; Maintenance & community, 82 against 70; Transparency & trust, 67 against 52. Also Agent-ready, a grade of BB or better; Runs on your own machine.

| Category | Eulerpool Financial Data API | Twelve Data |
| --- | --- | --- |
| Reliability (16%) | 40 | 83 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 53 | 83 |
| Agent ergonomics (13%) | 48 | 84 |
| Security & auth (14%) | 35 | 54 |
| Payments & pricing (10%) | 40 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 70 | 82 |
| Transparency & trust (7%) | 52 | 67 |

| Fact (where they differ) | Eulerpool Financial Data API | Twelve Data |
| --- | --- | --- |
| Vendor | Eulerpool Research Systems Pte. Ltd. | Twelve Data Pte. Ltd. |
| Hosted endpoint | `https://api.eulerpool.com/mcp` | `https://api.twelvedata.com` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP, stdio, websocket |
| Auth | API key | OAuth or key |
| Licence | Proprietary, under Eulerpool Research Systems Pte. Ltd.'s terms of service | none |
| Tools exposed | 157 | 27 |
| Read-only variant documented | no | yes |
| Last release | 2026-11-06 | 2026-10-12 |
| Terms last updated | 2026-11-06 | 2026-01-01 |
| Privacy policy last updated | 2026-11-06 | 2026-09-22 |
| Terms restrict automated access | yes | not found in the text |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | not found in the text | yes |
| Popularity | none | 791 stars |

Why the edge:
- Reliability, Twelve Data +43: Eulerpool Financial Data API 40 (Hosted lines. The status page lists three components with checks that were still loading, no history and a note that incident reporting is 'coming soon' (5 of 20). No incident history (5). Monthly quotas per plan are published, with no per-second figures (10 of 15). 429 at the free cap with X-RateLimit headers and a reset timestamp, no Retry-After or backoff guidance (10 of 15). No SLA found (0). Generally available (10). 5+5+10+10+0+10 = 40.); Twelve Data 83 (Read with the hosted lines. A public status page at twelvedata.isitup.cloud lists Price API, Fundamentals API, WebSocket and Website with uptime figures (20). Its history shows two incidents in the 90 days to 3 November 2026, 20 minutes of unavailability across the three APIs on 1 September and 16 minutes on the WebSocket on 14 October, minor only (20). Limits are published with numbers, credits a minute by plan from 8 to 10,946 and 800 a day on Basic (15). The docs document a 429 on the limit and the usage endpoint, with no Retry-After or backoff guidance; reads only (8 of 15). The terms sell a 99.9 per cent SLA with service credits, and the Enterprise plan carries 99.99 per cent (10). The REST API and MCP server are generally available (10). 20 + 20 + 15 + 8 + 10 + 10 = 83.)
- Agent ergonomics, Twelve Data +36: Eulerpool Financial Data API 48 (The MCP page claims 157+ tools with no toolsets or list, and response sizing on the API wasn't documented in the pages read (8 of 25). Filtering and pagination not documented in the pages read (8 of 20). Error codes not documented in the pages read (5 of 20). The data endpoints are reads (12 of 20). Official SDKs in Python, JavaScript, Node.js and Go (15). 8+8+5+12+15 = 48.); Twelve Data 84 (The REST API is the surface graded. `outputsize` 1 to 5,000 with a default of 30, `format=CSV`, `dp`, date ranges and batch requests size responses, and the MCP server lists 27 tools (20 of 25). Date ranges, `outputsize` and exchange, country and type filters, with no cursor pagination (15 of 20). Error codes with meanings an agent can branch on, 403 for plan limits and 429 for credits (16 of 20). Every operation is a read, and the MCP source marks tools readOnlyHint (18 of 20). Few required parameters, a demo key, and official SDKs in Python, Node.js, Go, Java and R (15). 20 + 15 + 16 + 18 + 15 = 84.)
- Schema & documentation, Twelve Data +30: Eulerpool Financial Data API 53 (An OpenAPI 3.0 document is linked at api.eulerpool.com/api/1/documentation/yaml, but that host's robots.txt disallows every path, so it was not read; partial credit for a linked contract we couldn't check (10 of 25). llms.txt, a 449-entry endpoint index and a 13,904-line llms-full.txt (10). Endpoint descriptions say what each returns, with the same marketing sentence repeated in every section and little on when not to use one (10 of 20). Parameter typing not visible in the llms files read (7 of 15). Response examples throughout; the errors page was not read (8 of 15). /api/1 paths and a dated changelog that mixes API changes with tutorial posts (8 of 15). 10+10+10+7+8+8 = 53.); Twelve Data 83 (A public OpenAPI 3.1 document covers 187 operations, every one with a description and 200, 400, 401, 403, 404, 414, 429 and 500 responses, and the MCP tools in the source carry typed inputs and annotations (25). llms.txt on the site and in the docs link Markdown pages per section, pricing.md and auth.md (10). Descriptions state purpose, plan requirement and credit cost, with little on when not to use an endpoint (16 of 20). Required parameters are marked and the Markdown lists interval, adjust and type values, but none of the 3,091 parameters in the spec declares an enum (9 of 15). Examples with a demo key on every endpoint and an error table with codes and meanings (13 of 15). No version in the path, a spec at version 0.0.1, and monthly dated product updates on the news page rather than an API changelog (10 of 15). 25 + 10 + 16 + 9 + 13 + 10 = 83.)
- Security & auth, Twelve Data +19: Eulerpool Financial Data API 35 (One API key per account, revocability not stated (20), less 10 because `?token=` in the URL is documented as the first option (10 of 30). Read-only data (15 of 20). News, earnings-call transcripts and AI-generated SWOT text are returned with no prompt-injection guidance (5 of 15). Quota headers on each response; no usage log found (5 of 15). No security.txt check, disclosure policy, bug bounty or certification found (0 of 20). 10+15+5+5+0 = 35.); Twelve Data 54 (The REST key is a plain per-account key with no scopes, accepted as a header or as `?apikey=` (20 less 10 for the query string). The hosted MCP server refuses keys and uses OAuth 2.1 with PKCE, a resource indicator, refresh tokens, revocation and one scope, which lifts the credential model for that surface (18 of 30). Every operation is a read (15 of 20). Company news is third-party text and no guidance was found (5 of 15). An `/api_usage` endpoint and dashboard usage give the key holder a view of consumption, not a per-call log (6 of 15). A trust centre on SafeBase lists SOC 2, GDPR and CCPA and ten policies; no security.txt, disclosure process or bug bounty was found (10 of 20). 18 + 15 + 5 + 6 + 10 = 54.)
- Transparency & trust, Twelve Data +15: Eulerpool Financial Data API 52 (Closed service under terms dated 6 November 2026 naming Eulerpool Research Systems Pte. Ltd. of Singapore (15 of 30). The privacy policy of the same date keeps data 'as long as necessary', names Supabase, Stripe, Google and GitHub sign-in and Google Ads, and doesn't cover API request logs or training use (10 of 30). No deprecation policy or notices found (0 of 20). Some processors named; hosting location not stated (8 of 20). 15+10+0+8 = 33.); Twelve Data 67 (A closed service under terms that name the entity, define internal use, business use and redistribution, and were last updated 1 January 2026; the MCP repository is open source but ships no licence file (15 of 30). The privacy policy of 22 September 2026 states retention periods and names its processors, the terms require data deletion within 30 days of termination, and no DPA is named (20 of 30). No deprecation policy or notice period; the terms allow changes and the monthly updates record them after the fact (3 of 20). Subprocessors are named on the privacy policy and the trust centre, with no data locations beyond transfer mechanisms (12 of 20). 15 + 20 + 3 + 12 = 50.)
- Maintenance & community, Twelve Data +12: Eulerpool Financial Data API 70 (Closed service. The changelog's newest entry is dated 6 November 2026 (30), with daily entries through October, though many are tutorials rather than API changes (20). Contact by email; no public tracker or community found (5 of 15). Official SDKs in four languages, published 13 September 2026 (12 of 15). Package health not checked (3 of 10). 30+20+5+12+3 = 70.); Twelve Data 82 (Read as a closed service. The newest dated change is the product update of 12 October 2026, with the MCP repository changed on 1 October and the world-model dataset repository on 31 October (30). Monthly updates dated 12 August, 12 September and 12 October 2026 (20). A monthly changelog, a support portal, a sales contact and a Telegram channel; replies on the MCP repository's issues were not read (10 of 15). Six official SDKs and a CLI, twelvedata-python at v1.4.0 of 27 April 2026 (15). The MCP server pins its dependencies with reasons and ships tests; the Python SDK's changelog stops at version 0.1 (7 of 10). 30 + 20 + 10 + 15 + 7 = 82.)