StoneX

StoneX Group is a global financial services organization that provides execution, risk management, market intelligence, and post-trade services across asset classes and markets to institutional, commercial, and retail clients. StoneX offers REST APIs for payments, clearing, and futures trading with OAuth 2.0 authentication.

StoneX publishes 8 API contracts indexed on the APIs.io network, including Accounts API, Authentication API, Documents API, and 5 more. Tagged areas include Finance, Financial Services, Payments, Clearing, and Futures.

The StoneX catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

StoneX’s developer surface includes authentication, documentation, and 12 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

31.4/100 thin ▬ flat Agent 19/100 agent aware Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessEnterprise

2 published contracts

Finance Financial Services Payments Clearing Futures Trading Risk Management

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Payments & Card Management

BC-1340

FX RatesPayments

POST /payments GET /rates

Kin Score

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

Composite quality — 31.4/100 · thin

Contract Quality 10.4 / 19

Developer Ergonomics 5.0 / 15

Access Clarity 0.6 / 15

Operational Transparency 1.9 / 10

Contract Governance 1.2 / 9

Discoverability 4.8 / 8

Regulatory Posture 3.1 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 19/100 · 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 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 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 0 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Payments 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 Ask about this →
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) 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 →
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link Ask about this →
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →

10 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 33.3 — up to +13.3 composite points Ask about this →
Contract Quality scores 55.5 — up to +11.1 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/stonex/apis.yml: open an issue on github.com/api-evangelist/stonex 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
France Authorised Financial Firms (ACPR REGAFI + AMF white list)	regulated	58.9	-	-
Canada RPAA Payment Service Providers (Bank of Canada registry + Payments Canada)	regulated	58.9	-	-
Brazil BCB Authorized Institutions (Banco Central do Brasil register beyond Pix)	regulated	58.9	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

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 8

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

StoneX GF Futures API

The StoneX GF (GAIN Futures) API provides institutional-grade access to futures trading including market data, order management, account and position tracking, margin calculatio...

StoneX Developer Portal

The StoneX Developer Storefront provides access to all StoneX API products with subscription keys, documentation, and developer resources for integrating with StoneX financial s...

StoneX Accounts API

Account information and management.

StoneX Authentication API

OAuth 2.0 token management.

StoneX Documents API

Document retrieval and management.

StoneX FX Rates API

Foreign exchange rate queries.

StoneX Payments API

Payment execution and management.

StoneX Trading API

Trade submission and management.

Scroll for all 8

Open Collections 8

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

StoneX Clearing Accounts API

OPEN COLLECTION

StoneX Clearing Accounts Authentication API

OPEN COLLECTION

StoneX Clearing API

OPEN COLLECTION

StoneX Clearing Accounts Documents API

OPEN COLLECTION

StoneX Clearing Accounts FX Rates API

OPEN COLLECTION

StoneX Clearing Accounts Payments API

OPEN COLLECTION

StoneX Payments API

OPEN COLLECTION

StoneX Clearing Accounts Trading API

OPEN COLLECTION

Scroll for all 8

StoneX API pricing

Not yet checked against StoneX's own pricing page. Compiled by API Evangelist on 2026-05-05 from www.stonex.com; confirm before you rely on a figure.

Plan	Price
Contact Sales enterprise	—

Plan details, limits and sources →

Rate limits

Contract-Bound Limits: governed by institutional onboarding and venue connectivity profile varies

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

Pricing Plans 1

Published pricing tiers and plan structures.

StoneX Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

StoneX Rate Limits

1 limits

RATE LIMITS

FinOps 1

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

StoneX Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Stonex Context

25 classes · 0 properties

JSON-LD

Spectral Rules 2

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

StoneX — jsonschema rules

5 rules · 4 warn-severity 1 info-severity

SPECTRAL

StoneX API Rules

7 rules · 3 error-severity 3 warn-severity 1 info-severity

SPECTRAL

JSON Schema 2

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

StoneX Clearing Account

6 properties

JSON SCHEMA

StoneX Payment

11 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

StoneX Payment Structure

0 properties

JSON STRUCTURE

Examples 1

Example request and response payloads for these APIs.

StoneX Create Payment Example

2 fields

EXAMPLE

Security Posture 3

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

StoneX Authentication

http · 1 scheme

SECURITY

StoneX Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

StoneX Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

StoneX Agentic Access

15 operations · 4 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

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 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 2

The organization behind the API

LinkedIn

Website

Website

Other 1

Properties that don't map to a standard resource type

CapabilityMap

CapabilityMap

Source (apis.yml)

aid: stonex
name: StoneX
description: StoneX Group is a global financial services organization that provides execution, risk management, market intelligence,
  and post-trade services across asset classes and markets to institutional, commercial, and retail clients. StoneX offers
  REST APIs for payments, clearing, and futures trading with OAuth 2.0 authentication.
type: Index
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: true
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: enterprise
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Enterprise
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/stonex.png
tags:
- Finance
- Financial Services
- Payments
- Clearing
- Futures
- Trading
- Risk Management
tags_raw:
- Finance
- Financial Services
- Payments
- Clearing
- Futures
- Trading
- Risk Management
- Financial-Services
url: https://raw.githubusercontent.com/api-evangelist/stonex/refs/heads/main/apis.yml
created: '2026-05-02'
modified: '2026-05-19'
specificationVersion: '0.23'
apis:
- aid: stonex:stonex-gf-api
  name: StoneX GF Futures API
  description: The StoneX GF (GAIN Futures) API provides institutional-grade access to futures trading including market data,
    order management, account and position tracking, margin calculations, contract lookup, and real-time price feeds for futures
    contracts.
  humanURL: https://futures-media.stonex.com/gfapi/index.html
  tags:
  - Futures
  - Trading
  - Market Data
  - Institutional
  properties:
  - type: Documentation
    url: https://futures-media.stonex.com/gfapi/index.html
- aid: stonex:stonex-developer-portal
  name: StoneX Developer Portal
  description: The StoneX Developer Storefront provides access to all StoneX API products with subscription keys, documentation,
    and developer resources for integrating with StoneX financial services.
  humanURL: https://developer.stonex.com/
  tags:
  - Developer Portal
  - API Management
  properties:
  - type: Documentation
    url: https://developer.stonex.com/documentation
  - type: Products
    url: https://developer.stonex.com/products
- aid: stonex:stonex-accounts-api
  name: StoneX Accounts API
  description: Account information and management.
  humanURL: https://docs.payments.stonex.io/
  tags:
  - Account
  tags_raw:
  - Accounts
  properties:
  - type: OpenAPI
    url: openapi/stonex-accounts-api-openapi.yml
  - type: Documentation
    url: https://docs.payments.stonex.io/
  - type: GettingStarted
    url: https://docs.payments.stonex.io/docs/quickstart-guide-1
  - type: Documentation
    url: https://docs.clearing.stonex.com/docs
  - type: GettingStarted
    url: https://docs.clearing.stonex.com/docs/getting-started/introduction
- aid: stonex:stonex-authentication-api
  name: StoneX Authentication API
  description: OAuth 2.0 token management.
  humanURL: https://docs.payments.stonex.io/
  tags:
  - Authentication
  properties:
  - type: OpenAPI
    url: openapi/stonex-authentication-api-openapi.yml
  - type: Documentation
    url: https://docs.payments.stonex.io/
  - type: GettingStarted
    url: https://docs.payments.stonex.io/docs/quickstart-guide-1
  - type: Documentation
    url: https://docs.clearing.stonex.com/docs
  - type: GettingStarted
    url: https://docs.clearing.stonex.com/docs/getting-started/introduction
- aid: stonex:stonex-documents-api
  name: StoneX Documents API
  description: Document retrieval and management.
  humanURL: https://docs.payments.stonex.io/
  tags:
  - Documents
  properties:
  - type: OpenAPI
    url: openapi/stonex-documents-api-openapi.yml
  - type: Documentation
    url: https://docs.payments.stonex.io/
  - type: GettingStarted
    url: https://docs.payments.stonex.io/docs/quickstart-guide-1
  - type: Documentation
    url: https://docs.clearing.stonex.com/docs
  - type: GettingStarted
    url: https://docs.clearing.stonex.com/docs/getting-started/introduction
- aid: stonex:stonex-fx-rates-api
  name: StoneX FX Rates API
  description: Foreign exchange rate queries.
  humanURL: https://docs.payments.stonex.io/
  tags:
  - FX Rates
  properties:
  - type: OpenAPI
    url: openapi/stonex-fx-rates-api-openapi.yml
  - type: Documentation
    url: https://docs.payments.stonex.io/
  - type: GettingStarted
    url: https://docs.payments.stonex.io/docs/quickstart-guide-1
  - type: Documentation
    url: https://docs.clearing.stonex.com/docs
  - type: GettingStarted
    url: https://docs.clearing.stonex.com/docs/getting-started/introduction
- aid: stonex:stonex-payments-api
  name: StoneX Payments API
  description: Payment execution and management.
  humanURL: https://docs.payments.stonex.io/
  tags:
  - Payments
  properties:
  - type: OpenAPI
    url: openapi/stonex-payments-api-openapi.yml
  - type: Documentation
    url: https://docs.payments.stonex.io/
  - type: GettingStarted
    url: https://docs.payments.stonex.io/docs/quickstart-guide-1
  - type: Documentation
    url: https://docs.clearing.stonex.com/docs
  - type: GettingStarted
    url: https://docs.clearing.stonex.com/docs/getting-started/introduction
- aid: stonex:stonex-trading-api
  name: StoneX Trading API
  description: Trade submission and management.
  humanURL: https://docs.payments.stonex.io/
  tags:
  - Trading
  properties:
  - type: OpenAPI
    url: openapi/stonex-trading-api-openapi.yml
  - type: Documentation
    url: https://docs.payments.stonex.io/
  - type: GettingStarted
    url: https://docs.payments.stonex.io/docs/quickstart-guide-1
  - type: Documentation
    url: https://docs.clearing.stonex.com/docs
  - type: GettingStarted
    url: https://docs.clearing.stonex.com/docs/getting-started/introduction
common:
- type: Plans
  url: plans/stonex-plans-pricing.yml
- type: RateLimits
  url: rate-limits/stonex-rate-limits.yml
- type: FinOps
  url: finops/stonex-finops.yml
- type: CapabilityMap
  url: capabilities/stonex-capability-edges.yml
  name: StoneX Business Capability Map
- type: AgenticAccess
  url: agentic-access/stonex-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/stonex-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/stonex-domain-security.yml
- type: Authentication
  url: authentication/stonex-authentication.yml
- type: GitHubOrganization
  url: https://github.com/stonex
- type: LinkedIn
  url: https://www.linkedin.com/company/stonex-group
- type: Website
  url: https://www.stonex.com
- type: DeveloperPortal
  url: https://developer.stonex.com/
- type: Documentation
  url: https://developer.stonex.com/documentation
- type: LlmsText
  url: https://developer.stonex.com/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

StoneX API — frequently asked questions

Does StoneX have an API?

Yes. APIs.io lists 8 APIs from StoneX, including StoneX GF Futures API, StoneX Developer Portal and StoneX Accounts API, and 5 more.

Is there an OpenAPI specification for the StoneX API?

Yes. APIs.io indexes 6 OpenAPI specifications for StoneX, each linked for download from this page.

How do I authenticate with the StoneX API?

StoneX uses bearer-token authentication (http · 1 scheme). The details are profiled on APIs.io as StoneX Authentication.

How much does the StoneX API cost?

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

Is the StoneX API ready for AI agents?

StoneX has a Kin Score of 31.4 out of 100 (thin) and an Agent Readiness score of 19.0 (agent-aware), scored by API Evangelist on 2026-11-13.

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