Capital.com Public API

Capital.com is a European trading platform offering CFDs across shares, indices, commodities, forex, and cryptocurrencies. The Capital.com Public API provides direct access to the trading engine for automated strategies, giving programmatic control of positions, working orders, account preferences, and historical and streaming market data. A companion WebSocket API streams real-time prices and OHLC candles for up to 40 concurrent instruments.

Capital.com Public API is listed with 8 APIs on the APIs.io network, including Capital.com WebSocket API, Accounts API, General API, and 5 more. Tagged areas include CFD, Commodities, Cryptocurrency, Finance, and Foreign Exchange.

The Capital.com Public API catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Capital.com Public API’s developer surface includes authentication, documentation, sandbox, support, engineering blog, and 11 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

31.3/100 thin ▬ flat Agent 21/100 agent aware Front door AI 1/6 silent Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessFreemiumSelf serve⚡ Free to try

8 APIs

CFD Commodities Cryptocurrency Finance Foreign Exchange Indices Market Data Share Streaming Trading WebSocket Real-Time

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 31.3/100 · thin

Contract Quality 10.9 / 19

Developer Ergonomics 3.8 / 15

Access Clarity 1.2 / 15

Operational Transparency 2.1 / 10

Contract Governance 1.2 / 9

Discoverability 4.7 / 8

Regulatory Posture 3.3 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 21/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document

8 more unmet checks in the Agent Readiness table above.

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

Access Clarity scores 7.9 — up to +18.4 composite points
Developer Ergonomics scores 25.0 — up to +15.0 composite points
Contract Quality scores 58.3 — up to +10.4 composite points

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.

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/capital-com-public-api/apis.yml: open an issue on github.com/api-evangelist/capital-com-public-api 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 3

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.

WebSockets

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

OpenAPI

measured — observed by APIs.io (published)

AsyncAPI

measured — observed by APIs.io (published)

APIs 8

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

Capital.com WebSocket API

The Capital.com WebSocket API streams real-time market data, supporting up to 40 concurrent instruments and OHLC candlestick subscriptions for low-latency trading applications.

Capital.com Public API Accounts API

Account information, preferences, and demo top-up.

Capital.com Public API General API

Server time, ping, and encryption-key utility endpoints.

Capital.com Public API History API

Account activity and transaction history.

Capital.com Public API Markets API

Market navigation and instrument lookup.

Capital.com Public API Positions API

Operations for opening, updating, and closing trading positions.

Capital.com Public API Session API

Operations for creating, switching, and ending API sessions.

Capital.com Public API Working Orders API

Operations for managing limit and stop working orders.

Scroll for all 8

Open Collections 8

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

Capital.com REST Accounts API

OPEN COLLECTION

Capital.com REST API

OPEN COLLECTION

Capital.com REST Accounts General API

OPEN COLLECTION

Capital.com REST Accounts History API

OPEN COLLECTION

Capital.com REST Accounts Markets API

OPEN COLLECTION

Capital.com REST Accounts Positions API

OPEN COLLECTION

Capital.com REST Accounts Session API

OPEN COLLECTION

Capital.com REST Accounts Working Orders API

OPEN COLLECTION

Scroll for all 8

Capital.com Public API pricing

Not yet checked against Capital.com Public API's own pricing page. Compiled by API Evangelist on 2026-05-04; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free
Professional paid	Free
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against Capital.com Public API's documentation. All 5 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Capital Com Public Api Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Capital Com Public Api Rate Limits

5 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Capital.com Public API

SLA

FinOps 1

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

Capital Com Public Api Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Capital.com WebSocket Streaming API

Real-time streaming API from Capital.com for market data and OHLC candlestick updates. Clients connect over WebSocket using session tokens (CST and X-SECURITY-TOKEN) obtained fr...

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Capital.com Public API — asyncapi rules

5 rules · 1 errors 3 warnings 1 info

SPECTRAL

Security Posture 3

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

Capital Com Public Api Authentication

apiKey · 3 schemes

SECURITY

Capital Com Public Api Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Capital Com Public Api Vulnerability Disclosure

Intigriti · security.txt · contact published

SECURITY

Agentic Access 1

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

Capital Com Public Api Agentic Access

27 operations · 11 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

Sandbox

Sandbox

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

Support

Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans

FinOps

PrivacyPolicy

TermsOfService

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

aid: capital-com-public-api
url: https://raw.githubusercontent.com/api-evangelist/capital-com-public-api/refs/heads/main/apis.yml
name: Capital.com Public API
description: Capital.com is a European trading platform offering CFDs across shares, indices, commodities, forex, and cryptocurrencies.
  The Capital.com Public API provides direct access to the trading engine for automated strategies, giving programmatic control
  of positions, working orders, account preferences, and historical and streaming market data. A companion WebSocket API streams
  real-time prices and OHLC candles for up to 40 concurrent instruments.
type: Index
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: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
position: Consuming
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/capital-com-public-api.png
x-docs-platform: redocly
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-09-21
tags:
- CFD
- Commodities
- Cryptocurrency
- Finance
- Foreign Exchange
- Indices
- Market Data
- Share
- Streaming
- Trading
- WebSocket
- Real-Time
tags_raw:
- CFD
- Commodities
- Cryptocurrency
- Financial
- Forex
- Indices
- Market Data
- Shares
- Streaming
- Trading
- WebSocket
- Real-Time
created: '2024-12-03'
modified: '2026-05-29'
specificationVersion: '0.23'
apis:
- aid: capital-com-public-api:capital-com-websocket-api
  name: Capital.com WebSocket API
  description: The Capital.com WebSocket API streams real-time market data, supporting up to 40 concurrent instruments and
    OHLC candlestick subscriptions for low-latency trading applications.
  humanURL: https://open-api.capital.com
  tags:
  - Market Data
  - Streaming
  - Trading
  - WebSocket
  properties:
  - type: Documentation
    url: https://open-api.capital.com
  - type: AsyncAPI
    url: asyncapi/capital-com-public-api-asyncapi.yml
  x-features:
  - Real-time price streaming via WebSocket
  - Up to 40 concurrent instrument subscriptions
  - OHLC candlestick streaming
  - Low-latency market data for trading systems
  x-use-cases:
  - Low-latency automated trading execution
  - Real-time market dashboards
  - Streaming-data backtesting and replay
- aid: capital-com-public-api:capital-com-public-api-accounts-api
  name: Capital.com Public API Accounts API
  description: Account information, preferences, and demo top-up.
  humanURL: https://open-api.capital.com
  tags:
  - Account
  tags_raw:
  - Accounts
  properties:
  - type: OpenAPI
    url: openapi/capital-com-public-api-accounts-api-openapi.yml
  - type: Documentation
    url: https://open-api.capital.com
  - type: Base URL
    url: https://api-capital.backend-capital.com/
  - type: Sandbox
    url: https://demo-api-capital.backend-capital.com/
  - type: Authentication
    url: https://open-api.capital.com
- aid: capital-com-public-api:capital-com-public-api-general-api
  name: Capital.com Public API General API
  description: Server time, ping, and encryption-key utility endpoints.
  humanURL: https://open-api.capital.com
  tags: []
  tags_raw:
  - General
  properties:
  - type: OpenAPI
    url: openapi/capital-com-public-api-general-api-openapi.yml
  - type: Documentation
    url: https://open-api.capital.com
  - type: Base URL
    url: https://api-capital.backend-capital.com/
  - type: Sandbox
    url: https://demo-api-capital.backend-capital.com/
  - type: Authentication
    url: https://open-api.capital.com
- aid: capital-com-public-api:capital-com-public-api-history-api
  name: Capital.com Public API History API
  description: Account activity and transaction history.
  humanURL: https://open-api.capital.com
  tags:
  - History
  properties:
  - type: OpenAPI
    url: openapi/capital-com-public-api-history-api-openapi.yml
  - type: Documentation
    url: https://open-api.capital.com
  - type: Base URL
    url: https://api-capital.backend-capital.com/
  - type: Sandbox
    url: https://demo-api-capital.backend-capital.com/
  - type: Authentication
    url: https://open-api.capital.com
- aid: capital-com-public-api:capital-com-public-api-markets-api
  name: Capital.com Public API Markets API
  description: Market navigation and instrument lookup.
  humanURL: https://open-api.capital.com
  tags:
  - Markets
  properties:
  - type: OpenAPI
    url: openapi/capital-com-public-api-markets-api-openapi.yml
  - type: Documentation
    url: https://open-api.capital.com
  - type: Base URL
    url: https://api-capital.backend-capital.com/
  - type: Sandbox
    url: https://demo-api-capital.backend-capital.com/
  - type: Authentication
    url: https://open-api.capital.com
- aid: capital-com-public-api:capital-com-public-api-positions-api
  name: Capital.com Public API Positions API
  description: Operations for opening, updating, and closing trading positions.
  humanURL: https://open-api.capital.com
  tags:
  - Positions
  properties:
  - type: OpenAPI
    url: openapi/capital-com-public-api-positions-api-openapi.yml
  - type: Documentation
    url: https://open-api.capital.com
  - type: Base URL
    url: https://api-capital.backend-capital.com/
  - type: Sandbox
    url: https://demo-api-capital.backend-capital.com/
  - type: Authentication
    url: https://open-api.capital.com
- aid: capital-com-public-api:capital-com-public-api-session-api
  name: Capital.com Public API Session API
  description: Operations for creating, switching, and ending API sessions.
  humanURL: https://open-api.capital.com
  tags:
  - Sessions
  tags_raw:
  - Session
  properties:
  - type: OpenAPI
    url: openapi/capital-com-public-api-session-api-openapi.yml
  - type: Documentation
    url: https://open-api.capital.com
  - type: Base URL
    url: https://api-capital.backend-capital.com/
  - type: Sandbox
    url: https://demo-api-capital.backend-capital.com/
  - type: Authentication
    url: https://open-api.capital.com
- aid: capital-com-public-api:capital-com-public-api-working-orders-api
  name: Capital.com Public API Working Orders API
  description: Operations for managing limit and stop working orders.
  humanURL: https://open-api.capital.com
  tags:
  - Working Orders
  properties:
  - type: OpenAPI
    url: openapi/capital-com-public-api-working-orders-api-openapi.yml
  - type: Documentation
    url: https://open-api.capital.com
  - type: Base URL
    url: https://api-capital.backend-capital.com/
  - type: Sandbox
    url: https://demo-api-capital.backend-capital.com/
  - type: Authentication
    url: https://open-api.capital.com
common:
- type: Plans
  url: plans/capital-com-public-api-plans-pricing.yml
- type: RateLimits
  url: rate-limits/capital-com-public-api-rate-limits.yml
- type: FinOps
  url: finops/capital-com-public-api-finops.yml
- type: AgenticAccess
  url: agentic-access/capital-com-public-api-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/capital-com-public-api-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/capital-com-public-api-domain-security.yml
- type: Authentication
  url: authentication/capital-com-public-api-authentication.yml
- type: GitHubOrganization
  url: https://github.com/capital-com-sv
- type: LinkedIn
  url: https://www.linkedin.com/company/capitalcom
- type: Website
  url: https://capital.com/
- type: Documentation
  url: https://open-api.capital.com
- type: Sandbox
  url: https://demo-api-capital.backend-capital.com/
- type: PrivacyPolicy
  url: https://capital.com/privacy-policy
- type: TermsOfService
  url: https://capital.com/terms-and-conditions
- type: Support
  url: https://capital.com/help
- type: Blog
  url: https://capital.com/news-and-analysis
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Capital.com Public API — frequently asked questions

Does Capital.com Public API have an API?

Yes. APIs.io lists 8 APIs from Capital.com Public API, including Capital.com WebSocket API, Capital.com Public API Accounts API and Capital.com Public API General API, and 5 more.

Is there an OpenAPI specification for the Capital.com Public API?

Yes. APIs.io indexes 7 OpenAPI specifications for Capital.com Public API, each linked for download from this page.

How do I authenticate with the Capital.com Public API?

Capital.com Public API uses bearer-token authentication (apiKey · 3 schemes). The details are profiled on APIs.io as Capital Com Public Api Authentication.

How much does the Capital.com Public API cost?

APIs.io lists 3 pricing plans for Capital.com Public API, with each plan's price, limits and inclusions under Pricing on this page.

Is the Capital.com Public API ready for AI agents?

Capital.com Public API has a Kin Score of 31.3 out of 100 (thin) and an Agent Readiness score of 20.7 (agent-aware), scored by API Evangelist on 2026-11-06.

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