Currencyfair

Currencyfair is a fintech platform that enables individuals and businesses to send money internationally with lower fees and competitive exchange rates. Founded in 2009, it offers multi‑currency accounts, rate alerts, and integrations such as Xero, facilitating cross‑border payments, tuition fees, property purchases, and payroll. The service operates in over 150 countries, supporting more than 20 currencies, and is authorised as a payment institution.

Currencyfair is listed with 2 APIs on the APIs.io network, including Currency Fair API, and 1 more. Tagged areas include Company, Fintech, Money Transfer, International Payments, and Foreign Exchange.

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

Currencyfair’s developer surface includes engineering blog, support, documentation, and 12 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

27.7/100 thin ▼ -7.4 Agent 42/100 agent ready Heartbeat 96/100 alive Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

2 APIs

Company Fintech Money Transfer International Payments Foreign Exchange

Kin Score

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

Composite quality — 27.7/100 · thin

Contract Quality 8.5 / 19

Developer Ergonomics 2.2 / 15

Access Clarity 3.2 / 15

Operational Transparency 0.5 / 10

Contract Governance 1.6 / 9

Discoverability 4.7 / 8

Regulatory Posture 3.7 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 42/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 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 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 6 / 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 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
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

5 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 14.8 — up to +17.0 composite points
Access Clarity scores 21.1 — up to +15.8 composite points
Contract Quality scores 45.2 — up to +13.7 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/currencyfair/apis.yml: open an issue on github.com/api-evangelist/currencyfair 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 2

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.

Dynamic Client Registration

measured — observed by APIs.io (published)

OpenAPI

measured — observed by APIs.io (published)

APIs 2

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

CurrencyFair API

CurrencyFair API for international money transfers

Currencyfair Currency Fair API

The CurrencyFair API from Currencyfair — 209 operation(s) for currencyfair.

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Currencyfair API Rules

59 rules · 40 errors 16 warnings 3 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Currencyfair Overlay

0 actions · update

UNRECORDED

Security Posture 1

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

Currencyfair Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

WellKnown

WellKnown

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Access & Security 3

Authentication, authorization, and security posture

TrustCenter

TrustCenter

Security

Security

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: currencyfair
name: Currencyfair
description: Currencyfair is a fintech platform that enables individuals and businesses to send money internationally with
  lower fees and competitive exchange rates. Founded in 2009, it offers multi‑currency accounts, rate alerts, and integrations
  such as Xero, facilitating cross‑border payments, tuition fees, property purchases, and payroll. The service operates in
  over 150 countries, supporting more than 20 currencies, and is authorised as a payment institution.
url: https://raw.githubusercontent.com/api-evangelist/currencyfair/refs/heads/main/apis.yml
x-type: company
x-source: harvest:secondary-market
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-12 (modular-v1; was harvest)
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.20'
created: '2026-10-12'
modified: '2026-10-12'
tags:
- Company
- Fintech
- Money Transfer
- International Payments
- Foreign Exchange
tags_raw:
- Company
- Fintech
- Money Transfer
- International Payments
- Currency Exchange
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgentSkill
  url: skills/_index.yml
- type: Conformance
  url: conformance/currencyfair-conformance.yml
- type: WellKnown
  url: well-known/currencyfair-well-known.yml
- type: Hosts
  url: hosts/currencyfair-hosts.yml
- type: Vendors
  url: vendors/currencyfair-vendors.yml
- type: TrustCenter
  url: https://www.currencyfair.com/trust
- type: TermsOfService
  url: https://www.currencyfair.com/en-us/trust/terms-and-conditions
- type: Security
  url: https://blog.currencyfair.com/consumer/tag/security
- type: PrivacyPolicy
  url: https://www.currencyfair.com/trust/privacy-policy
- type: Login
  url: https://app.currencyfair.com/login/login
- type: DomainSecurity
  url: security/currencyfair-domain-security.yml
- type: Website
  url: https://www.currencyfair.com
- type: Blog
  url: https://blog.currencyfair.com/consumer
- type: Support
  url: https://support.currencyfair.com/s/?language=en_US
- type: Documentation
  url: https://support.currencyfair.com/s/?language=en_US
apis:
- name: CurrencyFair API
  description: CurrencyFair API for international money transfers
  humanURL: https://support.currencyfair.com/s/?language=en_US
  baseURL: https://api.currencyfair.com
  aid: currencyfair:currencyfair-api
- aid: currencyfair:currencyfair-currencyfair-api
  name: Currencyfair Currency Fair API
  description: The CurrencyFair API from Currencyfair — 209 operation(s) for currencyfair.
  humanURL: https://support.currencyfair.com/s/?language=en_US
  baseURL: https://api.currencyfair.com/
  tags:
  - CurrencyFair
  properties:
  - type: OpenAPI
    url: openapi/currencyfair-currencyfair-api-openapi.yml
x-enrichment:
  date: '2026-10-12'
  status: enriched
  artifacts_added: 9
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Currencyfair API — frequently asked questions

Does Currencyfair have an API?

Yes. APIs.io lists 2 APIs from Currencyfair, including CurrencyFair API and Currencyfair Currency Fair API.

Is there an OpenAPI specification for the Currencyfair API?

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

Is the Currencyfair API ready for AI agents?

Currencyfair has a Kin Score of 27.7 out of 100 (thin) and an Agent Readiness score of 41.5 (agent-ready), scored by API Evangelist on 2026-11-06.

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