Stooq

Stooq is a Poland-based financial data platform offering free access to historical and current market data for global equities, indices, currencies, cryptocurrencies, commodities, bonds, and economic indicators. Data is delivered as CSV via a simple REST-style URL interface at https://stooq.com/q/d/l/ using query parameters for ticker symbol, date range, and interval. As of early 2026 an API key (obtained via CAPTCHA on the site) is required. A known daily request quota applies; exceeding it returns an "Exceeded the daily hits limit" message. Bulk point-in-time snapshots of the full database (12,000+ securities) are also available as ZIP-compressed CSVs from https://stooq.com/db/h/.

Stooq publishes 1 API contract indexed on the APIs.io network: Q API. Tagged areas include Fintech, Market Data, Stocks, Indices, and Currency.

The Stooq catalog on APIs.io includes 1 Spectral governance ruleset.

Stooq’s developer surface includes developer portal, documentation, and 7 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

27.5/100 thin ▬ flat Agent 24/100 agent aware saas Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFree

1 published contract

Fintech Market Data Stocks Indices Currency Cryptocurrency Commodities Historical Data Free

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 27.5/100 · thin

Contract Quality 12.2 / 21

Developer Ergonomics 3.2 / 17

Access Clarity 0.7 / 17

Operational Transparency 0.5 / 11

Contract Governance 2.4 / 10

Discoverability 5.6 / 9

Regulatory Posture 1.5 / 15

Agent readiness — 24/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Securities & Market Data regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented) Ask about this →

6 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Access Clarity scores 4.3 — up to +19.1 composite points Ask about this →
Developer Ergonomics scores 19.0 — up to +16.2 composite points Ask about this →
Operational Transparency scores 4.8 — up to +12.4 composite points Ask about this →

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/stooq/apis.yml: open an issue on github.com/api-evangelist/stooq to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

OpenAPI

measured — observed by APIs.io (published)

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Stooq Q API

The Q API from Stooq — 1 operation(s) for q.

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Stooq Historical Data Q API

OPEN COLLECTION

Stooq API pricing

Not yet checked against Stooq's own pricing page. Compiled by API Evangelist on 2026-06-13 from stooq.com/db/h/; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free

Plan details, limits and sources →

Rate limits

Free daily quota: unlimited requests per day

Compiled by API Evangelist, not yet checked against Stooq's documentation. Rate-limit details →

Pricing Plans 1

Published pricing tiers and plan structures.

Stooq Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Stooq Rate Limits

1 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Stooq Finops

FINOPS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Stooq — jsonschema rules

5 rules · 3 warn-severity 2 info-severity

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

Stooq OHLCV Record

6 properties

JSON SCHEMA

Stooq Historical Data API Query Parameters

5 properties

JSON SCHEMA

Examples 3

Example request and response payloads for these APIs.

Stooq Apple Daily Ohlcv Example

4 fields

EXAMPLE

Stooq Bitcoin Weekly Ohlcv Example

4 fields

EXAMPLE

Stooq Quota Exceeded Example

4 fields

EXAMPLE

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Stooq Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access (API Evangelist recommendations) 1

Recommended x-agentic-access execution contracts for AI agents.

Stooq Agentic Access

1 operation

1 operations · 0 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Portal

Portal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

BulkData

BulkData

Source (apis.yml)

aid: stooq
url: https://raw.githubusercontent.com/api-evangelist/stooq/refs/heads/main/apis.yml
name: Stooq
kind: company
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: free
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Free
  confidence: low
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/stooq.png
tags:
- Fintech
- Market Data
- Stocks
- Indices
- Currency
- Cryptocurrency
- Commodities
- Historical Data
- Free
tags_raw:
- Fintech
- Market Data
- Stocks
- Indices
- Currencies
- Crypto
- Commodities
- Historical Data
- Free
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.23'
description: Stooq is a Poland-based financial data platform offering free access to historical and current market data for
  global equities, indices, currencies, cryptocurrencies, commodities, bonds, and economic indicators. Data is delivered as
  CSV via a simple REST-style URL interface at https://stooq.com/q/d/l/ using query parameters for ticker symbol, date range,
  and interval. As of early 2026 an API key (obtained via CAPTCHA on the site) is required. A known daily request quota applies;
  exceeding it returns an "Exceeded the daily hits limit" message. Bulk point-in-time snapshots of the full database (12,000+
  securities) are also available as ZIP-compressed CSVs from https://stooq.com/db/h/.
apis:
- aid: stooq:stooq-q-api
  name: Stooq Q API
  description: The Q API from Stooq — 1 operation(s) for q.
  humanURL: https://stooq.com/db/h/
  baseURL: https://stooq.com/q/d/l/
  tags:
  - Q
  properties:
  - type: OpenAPI
    url: openapi/stooq-q-api-openapi.yml
  - type: Documentation
    url: https://stooq.com/db/h/
  - type: JSONSchema
    url: json-schema/stooq-ohlcv-record.json
  - type: JSONSchema
    url: json-schema/stooq-query-parameters.json
  - type: Examples
    url: examples/stooq-apple-daily-ohlcv-example.json
  - type: Examples
    url: examples/stooq-bitcoin-weekly-ohlcv-example.json
  - type: Examples
    url: examples/stooq-quota-exceeded-example.json
  - type: Vocabulary
    url: vocabulary/stooq-vocabulary.json
  - type: JSONLD
    url: json-ld/stooq-jsonld.json
  - type: Plans
    url: plans/stooq-plans-pricing.yml
  - type: RateLimits
    url: rate-limits/stooq-rate-limits.yml
  - type: FinOps
    url: finops/stooq-finops.yml
common:
- type: Website
  url: https://www.stooq.com/
- type: AgenticAccess
  url: agentic-access/stooq-agentic-access.yml
- type: DomainSecurity
  url: security/stooq-domain-security.yml
- type: Portal
  url: https://stooq.com/
- type: Documentation
  url: https://stooq.com/db/h/
- type: BulkData
  url: https://stooq.com/db/h/
- type: Plans
  url: plans/stooq-plans-pricing.yml
- type: RateLimits
  url: rate-limits/stooq-rate-limits.yml
- type: FinOps
  url: finops/stooq-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Stooq API — frequently asked questions

Does Stooq have an API?

Yes. APIs.io lists 1 API from Stooq, including Stooq Q API.

Is there an OpenAPI specification for the Stooq API?

Yes. APIs.io indexes 1 OpenAPI specification for Stooq, each linked for download from this page.

How much does the Stooq API cost?

APIs.io lists 1 pricing plan for Stooq, with each plan's price, limits and inclusions under Pricing on this page.

Is the Stooq API ready for AI agents?

Stooq has a Kin Score of 27.5 out of 100 (thin) and an Agent Readiness score of 23.6 (agent-aware), scored by API Evangelist on 2026-11-13.

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