WorldFirst

WorldFirst is a United Kingdom-founded cross-border payments and money-movement company, headquartered in London and owned by Ant Group (Alipay) since 2019. It gives online sellers, marketplaces, and SMEs a multi-currency World Account to collect, hold, convert, and send money across borders, alongside a World Card for multi-currency spending and marketplace/supplier payouts. Its home market is the United Kingdom, but its book is global e-commerce and cross-border trade, serving merchants selling on Amazon and other marketplaces. WorldFirst ships a genuine, API-native developer platform at developers.worldfirst.com built on Ant Group's Antom-style gateway (open-sea/open-eu/open-na hosts, /amsin/api/v1 paths): a RESTful, JSON, HTTPS-only interface segmented into an Enterprise Solution (account, beneficiary, FX, transfer, payout, invoicing, virtual-card credit), a Pay Solution (Cashier Payment / online checkout acceptance for merchants), and a WorldTrade Solution (cross-border trade orders). Requests are secured with RSA256/ECC224 digital signatures plus OAuth 2.0 access tokens; asynchronous notifications (webhooks) return payment and trade-order results. The public reference is documentation-and-console only — the underlying OpenAPI/Swagger is not offered as a downloadable spec (the gateway blocks anonymous spec fetches), so integration is gated behind partner onboarding and the console's iMock/iTest tooling.

WorldFirst publishes 3 APIs on the APIs.io network. Tagged areas include Payments, United Kingdom, Cross-Border, Money Transfer, and Foreign Exchange.

The WorldFirst catalog on APIs.io includes 1 event-driven AsyncAPI specification.

WorldFirst’s developer surface includes documentation, API reference, getting-started guide, pricing, engineering blog, signup flow, authentication, and 15 more developer resources.

39.9/100 thin ▬ flat Agent 23/100 agent aware Full breakdown ↓
scored 2026-07-27 · rubric v0.5
3 APIs
PaymentsUnited KingdomCross-BorderMoney TransferForeign ExchangePayoutsPayment GatewayE-commerceMulti-CurrencyCard Issuing

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 39.9/100 · thin
Contract Quality 5.7 / 25
Developer Ergonomics 11.7 / 20
Commercial Clarity 8.9 / 20
Operational Transparency 1.0 / 13
Governance 0.0 / 12
Discoverability 10.0 / 10
Agent readiness — 23/100 · agent aware
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 6 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/worldfirst: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 3

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

WorldFirst Enterprise Solution API

The WorldFirst Enterprise Solution (World Account) API — a RESTful, JSON, signed-request interface covering customer onboarding, account and beneficiary management, statements, ...

WorldFirst Pay Solution API

The WorldFirst Pay Solution (Cashier Payment) API lets overseas e-commerce merchants accept payments through a hosted checkout: create a payment order, let the customer complete...

WorldFirst WorldTrade Solution API

The WorldTrade Solution API supports cross-border trade transactions between partners and the WorldFirst platform — e.g. inquiryQuotes (FX quote lookup at /amsin/api/v1/payments...

Event Specifications 1

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

Security Posture 2

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

Worldfirst Authentication

signature/oauth2 · 2 schemes

SECURITY

Worldfirst Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 5

Portal, sign-up, and the first successful call

Documentation 2

Reference material describing how the API behaves

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Access & Security 2

Authentication, authorization, and security posture

Operate 1

Status, limits, changes, and where to get help

Commercial 3

Pricing, plans, and the legal terms of use

Company 3

The organization behind the API

Source (apis.yml)

apis.yml Raw ↑
aid: worldfirst
url: https://raw.githubusercontent.com/api-evangelist/worldfirst/refs/heads/main/apis.yml
name: WorldFirst
kind: company
description: 'WorldFirst is a United Kingdom-founded cross-border payments and money-movement company, headquartered in London
  and owned by Ant Group (Alipay) since 2019. It gives online sellers, marketplaces, and SMEs a multi-currency World Account
  to collect, hold, convert, and send money across borders, alongside a World Card for multi-currency spending and marketplace/supplier
  payouts. Its home market is the United Kingdom, but its book is global e-commerce and cross-border trade, serving merchants
  selling on Amazon and other marketplaces. WorldFirst ships a genuine, API-native developer platform at developers.worldfirst.com
  built on Ant Group''s Antom-style gateway (open-sea/open-eu/open-na hosts, /amsin/api/v1 paths): a RESTful, JSON, HTTPS-only
  interface segmented into an Enterprise Solution (account, beneficiary, FX, transfer, payout, invoicing, virtual-card credit),
  a Pay Solution (Cashier Payment / online checkout acceptance for merchants), and a WorldTrade Solution (cross-border trade
  orders). Requests are secured with RSA256/ECC224 digital signatures plus OAuth 2.0 access tokens; asynchronous notifications
  (webhooks) return payment and trade-order results. The public reference is documentation-and-console only — the underlying
  OpenAPI/Swagger is not offered as a downloadable spec (the gateway blocks anonymous spec fetches), so integration is gated
  behind partner onboarding and the console''s iMock/iTest tooling.'
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
tags:
- Payments
- United Kingdom
- Cross-Border
- Money Transfer
- Foreign Exchange
- Payouts
- Payment Gateway
- E-commerce
- Multi-Currency
- Card Issuing
created: '2026-07-24'
modified: '2026-07-24'
specificationVersion: '0.19'
apis:
- aid: worldfirst:worldfirst-enterprise-solution-api
  name: WorldFirst Enterprise Solution API
  description: The WorldFirst Enterprise Solution (World Account) API — a RESTful, JSON, signed-request interface covering
    customer onboarding, account and beneficiary management, statements, foreign exchange, transfer, payout, invoicing, and
    virtual-card (VC) credit for globally based partners and customers. Requests are signed with RSA256/ECC224 and carry an
    OAuth 2.0 Access-Token; no downloadable OpenAPI is published.
  humanURL: https://developers.worldfirst.com.cn/docs/alipay-worldfirst/worldfirst_enterprise_solution/api_overview
  baseURL: https://open-sea.worldfirst.com/amsin/api/v1
  tags:
  - Enterprise
  - World Account
  - Foreign Exchange
  - Payouts
  - Cross-Border
  properties:
  - type: Documentation
    url: https://developers.worldfirst.com.cn/docs/alipay-worldfirst/worldfirst_enterprise_solution/getting_started
  - type: APIReference
    url: https://developers.worldfirst.com.cn/docs/alipay-worldfirst/worldfirst_enterprise_solution/api_overview
- aid: worldfirst:worldfirst-pay-solution-api
  name: WorldFirst Pay Solution API
  description: 'The WorldFirst Pay Solution (Cashier Payment) API lets overseas e-commerce merchants accept payments through
    a hosted checkout: create a payment order, let the customer complete payment, inquire about payment status, and receive
    an asynchronous payment notification (webhook). RESTful JSON over HTTPS with RSA256/ECC224 signed requests; no downloadable
    OpenAPI is published.'
  humanURL: https://developers.worldfirst.com/docs/alipay-worldfirst/cashier_payment/getting_started
  baseURL: https://open-sea.worldfirst.com/amsin/api/v1
  tags:
  - Payment Acceptance
  - Cashier Payment
  - Checkout
  - E-commerce
  properties:
  - type: Documentation
    url: https://developers.worldfirst.com/docs/alipay-worldfirst/cashier_payment/development_via_api
  - type: APIReference
    url: https://developers.worldfirst.com/docs/alipay-worldfirst/cashier_payment/getting_started
- aid: worldfirst:worldfirst-worldtrade-solution-api
  name: WorldFirst WorldTrade Solution API
  description: The WorldTrade Solution API supports cross-border trade transactions between partners and the WorldFirst platform
    — e.g. inquiryQuotes (FX quote lookup at /amsin/api/v1/payments/inquiryQuotes), createTradeOrder to submit a trade order,
    and a WorldFirst-initiated notifyTradeOrderCloseResult asynchronous callback. RESTful JSON over HTTPS with RSA256/ECC224
    signed requests; no downloadable OpenAPI is published.
  humanURL: https://developers.worldfirst.com/docs/alipay-worldfirst/worldtrade_solution/overview
  baseURL: https://open-sea.worldfirst.com/amsin/api/v1
  tags:
  - Cross-Border
  - Trade
  - Foreign Exchange
  - Webhooks
  properties:
  - type: Documentation
    url: https://developers.worldfirst.com/docs/alipay-worldfirst/worldtrade_solution/overview
  - type: APIReference
    url: https://developers.worldfirst.com/docs/alipay-worldfirst/overview/apis
common:
- type: DomainSecurity
  url: security/worldfirst-domain-security.yml
- type: Website
  url: https://www.worldfirst.com/
- type: DeveloperPortal
  url: https://developers.worldfirst.com/
- type: Documentation
  url: https://developers.worldfirst.com/docs/alipay-worldfirst/overview/home
- type: APIReference
  url: https://developers.worldfirst.com/docs/alipay-worldfirst/overview/apis
- type: GettingStarted
  url: https://developers.worldfirst.com/docs/alipay-worldfirst/cashier_payment/getting_started
- type: Pricing
  url: https://www.worldfirst.com/uk/pricing/
- type: Blog
  url: https://www.worldfirst.com/uk/blog/
- type: TermsOfService
  url: https://www.worldfirst.com/uk/terms-and-conditions/
- type: PrivacyPolicy
  url: https://www.worldfirst.com/uk/privacy-policy/
- type: LinkedIn
  url: https://www.linkedin.com/company/world-first
- type: SignUp
  url: https://portal.worldfirst.com/register?lang=en-GB&region=global
- type: Login
  url: https://portal.worldfirst.com/login?lang=en-GB&region=global
- type: HelpCenter
  url: https://www.worldfirst.com/help-center/
- type: LLMsTxt
  url: llms/worldfirst-llms.txt
- type: Authentication
  url: authentication/worldfirst-authentication.yml
- type: Conventions
  url: conventions/worldfirst-conventions.yml
- type: ErrorCatalog
  url: errors/worldfirst-problem-types.yml
- type: Webhooks
  url: asyncapi/worldfirst-webhooks.yml
- type: Sandbox
  url: sandbox/worldfirst-sandbox.yml
- type: Lifecycle
  url: lifecycle/worldfirst-lifecycle.yml
- type: Conformance
  url: conformance/worldfirst-conformance.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com