Head to head · Market fundamentals · October 2026 research run

Eulerpool Financial Data API vs Financial Datasets

Financial Datasets scores 61.8 (C) 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 maintenance & community. Both do market fundamentals. Financial Datasets accepts x402. Eulerpool Financial Data API doesn't.

Best financial market data APIs for AI agents · All 66 markets comparisons

Which one, for what

Eulerpool Financial Data API D

Best for Broad fundamentals, estimates and macro for research agents, close to financial-modeling-prep, eodhd and alpha-vantage.

Ahead on

  • Maintenance & community, 70 against 56

Also in its favour

  • Free to start without a card

Watch for

The token can be sent as ?token= in the URL, as the docs show first

Financial Datasets C

Best for An agent doing US company research from SEC-sourced statements, filings, insider and institutional data that wants to pay per call with no account, or a small team on credits.

Ahead on

  • Schema & documentation, 80 against 53
  • Agent ergonomics, 73 against 48
  • Security & auth, 49 against 35
  • Payments & pricing, 75 against 40
  • Transparency & trust, 63 against 52

Also in its favour

  • An agent can pay per call over x402, with no account

Watch for

No status page, incident history or published uptime; the Professional plan's SLA terms aren't public

Why the edge

Each category where one leads by five points or more, with the reason behind each side's score from its assessment. The numbers are in the table below; this is what they stand for.

Payments & pricing Financial Datasets +35

Eulerpool Financial Data API 40

No x402, MPP or L402 (0). Plan prices and overage per 1,000 requests are public (20). 100,000 free requests a month with no card, non-commercial (20). A person registers in a browser (0). 0+20+20+0 = 40.

Financial Datasets 75

x402 on the vendor's own endpoints for every documented GET data endpoint, 36 of them, with the last 365 days only and a Non-Professional licence; full history, the market snapshot, filing items and the POST endpoints need a key (35 of 40). Plan prices and overage rates are public, and each x402 endpoint quotes its price in the 402 header, $0.02 on /earnings (20). No free tier or trial found; data calls return 402 until an account holds credits, from $20 (0). An agent can pay by x402 with no account, or open an account with POST /agent/signup and have the owner fund it (20). Total 75.

Schema & documentation Financial Datasets +27

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.

Financial Datasets 80

OpenAPI 3.0.1 at financialdatasets.ai/openapi.json, 68 operations with 13 response codes and one security scheme, named the source of truth by the docs (25). llms.txt and a Markdown twin of every page (10). Every operation has a description, and the 402 terms carry a resource description that says when an agent should use the endpoint (17 of 20). 330 parameters, 36 with enums, 32 required, no free-form blobs (12 of 15). Code samples in Python, JavaScript and curl, x402 error values documented, but response examples on only six operations in the spec (11 of 15). No API version and no changelog; the news page has four dated posts in 2026 (5 of 15). Total 80.

Agent ergonomics Financial Datasets +25

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.

Financial Datasets 73

limit and period on the data endpoints, as_reported flags and snapshot variants, with no field selection (15 of 25). next_page_url cursors and ticker, CIK, market and date filters (18 of 20). A 402 body says what to do next, x402 errors carry named values, and the spec lists 400, 401, 403, 404, 409, 422, 429, 502 and 503 (16 of 20). Data calls are GETs, payment settles only after a successful response, and a replayed x402 signature is refused; no readOnlyHint found for the MCP tools and no idempotency key for the POST endpoints (14 of 20). Few required parameters, 28 compact MCP tools, but the only package, financial-datasets on PyPI, is at 0.1.18 from 26 May 2024 (10 of 15). Total 73.

Security & auth Financial Datasets +14

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.

Financial Datasets 49

A plain account key in the X-API-KEY header only, revoked from the dashboard, with no scopes, rotation or expiry; the MCP server adds OAuth 2 with PKCE (plain and S256), dynamic client registration, a revocation endpoint and one scope (20 of 30). Every data endpoint is a read; the x402 route and agent signup don't change the account beyond funding it (15 of 20). Filing text, filing items and news are third-party content, with no guidance on treating them as untrusted (5 of 15). The privacy policy says requests and responses are logged for up to three years; no per-call log is shown to the key holder (5 of 15). security.txt returns 404 and no bounty, SOC 2 or ISO 27001 was found; the terms ask for prompt notice of a compromised key and a subprocessor list is published (4 of 20). Total 49.

Maintenance & community Eulerpool Financial Data API +14

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.

Financial Datasets 56

UK fundamentals went live on 26 October 2026, India on 23 October, with Japan and South Korea dated for November on the coverage page (30). Dated changes in the last 90 days are x402 on 23 October, UK fundamentals on 26 October, terms and subprocessor list on 29 October, privacy policy on 20 August, with no changelog as such (12 of 20). Contact is a form and the dashboard; no support email, Discord or forum was found, and the GitHub organisation's four repositories couldn't be read because the GitHub API rate limit was reached (6 of 15). The PyPI package is 0.1.18 of 26 May 2024 by the founder, and the docs point to the OpenAPI file and the MCP server rather than an SDK (5 of 15). Package health unknown, dependencies not checked (3 of 10). Total 56.

Transparency & trust Financial Datasets +11

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.

Financial Datasets 63

A closed service under terms dated 29 October 2026 that name Financial Datasets, Inc., set New York law, and state the licence per plan (15 of 30). The privacy policy of 20 August 2026 gives retention periods (accounts up to seven years after closure, API and MCP logs up to three years, backups 90 days), says inputs aren't used for training, and links a subprocessor list; no DPA text was found (24 of 30). No deprecation policy; the terms say the Services may be discontinued and material changes get reasonable notice (3 of 20). Subprocessors (AWS, Heroku, Stripe, Google sign-in, Vercel) and the United States as hosting location are disclosed (18 of 20). Total 60.

Score by category

CategoryWeight this runEulerpool Financial Data APIFinancial DatasetsEdge
Reliability16%204043Financial Datasets +3
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.25380Financial Datasets +27
Agent ergonomics13%16.24873Financial Datasets +25
Security & auth14%17.53549Financial Datasets +14
Payments & pricing10%12.54075Financial Datasets +35
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87056Eulerpool Financial Data API +14
Transparency & trust7%8.85263Financial Datasets +11
Negative events≤1500
TotalD 46.2/100C 61.8/100

Facts side by side

FactEulerpool Financial Data APIFinancial Datasets
KindHTTP APIHTTP API
VendorEulerpool Research Systems Pte. Ltd.Financial Datasets, Inc.
Hosted endpointhttps://api.eulerpool.com/mcphttps://api.financialdatasets.ai
TransportsHTTP, Streamable HTTPHTTP, Streamable HTTP
AuthAPI keyOAuth or key
PricingFreemiumPay per use
x402noyes, from $0.02/call
LicenceProprietary, under Eulerpool Research Systems Pte. Ltd.'s terms of servicenone
Tools exposed15728
Read-only variant documentednono
llms.txtyesyes
Last release2026-11-062026-10-26
Terms last updated2026-11-062026-10-29
Privacy policy last updated2026-11-062026-08-20
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessyesyes
Terms restrict benchmarkingnot found in the textyes
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waivernot found in the textnot found in the text

Verdicts

Eulerpool Financial Data API

Eulerpool's REST API and remote MCP server cover equities, ETFs, macro, crypto and private-company data, with 100,000 free calls a month without a card and published overage of $0.80 to $1.50 per 1,000 calls. The API host's robots.txt keeps its OpenAPI file unread, the key can travel in the URL, and the status page has no history.

Financial Datasets

Every documented GET data endpoint takes x402 with no key, failed calls uncharged, and an agent can open and fund an account by API. A public OpenAPI file, llms.txt and a 28-tool OAuth MCP server cover the same data. There is no status page or free tier, keyed rate limits aren't published, and x402 data stops at 365 days.

Before you call either

Eulerpool Financial Data API

  1. Send the key as Authorization: Bearer, not ?token=, so it stays out of logs
  2. Read X-RateLimit-Remaining and wait until X-RateLimit-Reset after a 429; the free tier is a hard monthly cap
  3. Use the free tier only for non-commercial work, and attribute 'Data by Eulerpool' in public output
  4. Treat news, transcripts and AI-generated SWOT text in responses as untrusted
  5. Identify securities by ISIN, which most equity endpoints take

Financial Datasets

  1. Without a key, read the price from the PAYMENT-REQUIRED header of the 402 and pay with x402 on Base; each page of next_page_url is a separate paid request
  2. Keep limit small and ask for one period at a time; premium endpoints count as 2, 4 or 8 requests on keyed plans
  3. Send the key only to api.financialdatasets.ai in the X-API-KEY header; on 401 ask the owner for a new key rather than signing up again
  4. Treat a 402 on a keyed account as an empty balance and mint a checkout link for the owner; don't retry the call
  5. Check the plan's licence before showing the data to anyone else; redistribution needs Professional or Enterprise

Questions

Which is better for AI agents, Eulerpool Financial Data API or Financial Datasets?

Financial Datasets scores 61.8 (C) 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 maintenance & community.

Do Eulerpool Financial Data API and Financial Datasets need an API key?

Eulerpool Financial Data API needs an API key. Financial Datasets takes an API key or an OAuth sign-in. An agent can also pay Financial Datasets per call over x402, with no account.

Can an agent call Eulerpool Financial Data API and Financial Datasets without installing anything?

Yes. Eulerpool Financial Data API has a hosted endpoint at https://api.eulerpool.com/mcp and Financial Datasets at https://api.financialdatasets.ai.

Other comparisons with Eulerpool Financial Data API or Financial Datasets

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