American Express
American Express is a globally integrated payments company and card network that offers charge and credit cards, merchant acquiring, corporate payments, travel, and Membership Rewards loyalty. Its developer platform at developer.americanexpress.com publishes a partner-oriented catalog of REST APIs spanning tokenization (AETS), fraud prevention (Enhanced Authorization), PSD2 open-banking account, transaction and confirmation-of-funds services, corporate @ Work expense management, Pay with Points redemption, Pay with Bank transfer payment initiation, Payment Account Reference, card-linked Smart Offers, Account Connect card-on-file, and the R42 Network Loyalty Platform. Access is onboarding-gated for registered issuers, merchants, acquirers, and partners rather than open self-service.
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles American Express the way a machine reads it — 36 machine-readable artifacts across 12 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — American Express scores 39.9/100 (thin), with a separate agent-readiness read of 16/100 (agent aware). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile American Express
Each block below is one kind of artifact we hold for American Express. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 12
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
American Express Token Service (AETS) API
The American Express Token Service (AETS) API allows developers to securely tokenize cardholder data, providing a layer of security for online transactions. By generating unique...
American Express Enhanced Authorization (EA)
American Express Enhanced Authorization (EA) is a fraud prevention tool that helps protect cardholders and merchants from unauthorized transactions. EA uses advanced algorithms ...
American Express Account and Transaction API
The American Express Account and Transaction API is an open-banking service that enables regulated third-party providers to access and retrieve detailed information about cardho...
American Express Confirmation of Funds PSD2 API
The American Express Confirmation of Funds PSD2 API is a secure and efficient service that enables regulated card-based payment instrument issuers to verify the availability of ...
American Express @ Work B2B API
The American Express @ Work B2B API is a suite of services that allows businesses to securely access their American Express corporate account information, make payments, and man...
American Express Card On-Demand
American Express Card On-Demand offers customers the convenience and flexibility of instantly receiving a digital card for their American Express account. This service allows el...
American Express Pay with Points
American Express Pay with Points allows cardholders to use the points they have earned through their American Express Membership Rewards program to make purchases at participati...
American Express API-Based Payment Platform
The American Express API-based Payment Platform allows eCommerce sellers and merchants to scale their business by integrating with Open Banking-enabled payment gateways. The inf...
American Express Payment Account Reference (PAR)
Payment Account Reference (PAR) provides an aggregated view of a Card Member's account activity across different payment formats. Developed by EMVCo, it is a non-financial refer...
American Express Smart Offer Partnership
The American Express Smart Offer Partnership product provides registered partners with access to certain American Express data required to run their card-linked offer and loyalt...
American Express AMEX Account Connect
AMEX Account Connect is a suite of APIs that enables eligible American Express Card Members to add their Cards on file with participating partners, using their American Express ...
American Express Network Loyalty Platform
The American Express Network Loyalty Platform (the R42 Platform) is a suite of real-time Application Programming Interfaces (APIs) offered to Issuers and their Concierge Service...
Scroll within the panel for all 12 ·
Pricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
American Express Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
American Express Finops
FINOPSFeatures 8
The notable capabilities this provider advertises, captured as structured features so they can be searched and compared instead of read one landing page at a time.
Notable capabilities this provider offers.
Card Tokenization
Secure tokenization of American Express card data using the AETS API, replacing sensitive cardholder information with unique tokens for safer online transactions.
Fraud Prevention
Real-time enhanced authorization using machine learning to detect and prevent fraudulent transactions before they are processed.
Open Banking APIs
PSD2-compliant account, transaction, and confirmation-of-funds APIs enabling third-party providers to access cardholder data with consent for Open Banking use cases.
Pay with Points
Global Pay with Points API enabling cardholders to redeem Membership Rewards points at checkout with participating merchants.
Network Loyalty Platform
The R42 Platform API suite enabling issuers and concierge service providers to manage elite tier benefits and loyalty point transfers.
B2B Expense Management
American Express at Work APIs for corporate card management, expense reconciliation, and business account administration.
Account Connect
AMEX Account Connect APIs allowing cardholders to link their American Express card with partner platforms using their AMEX credentials.
Smart Offer Partnerships
Card-linked offer and loyalty program APIs giving registered partners access to transaction data for enrolled card members.
Scroll within the panel for all 8 ·
Security Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Use Cases 6
What developers actually build with this provider — captured so the catalogue answers 'what is this for', not just 'what does this expose'.
What developers build with this provider.
E-Commerce Payment Security
Tokenizing American Express card data for secure online checkout, reducing PCI scope and preventing card data breaches at merchants.
Open Banking Compliance
Enabling regulated third-party providers to access cardholder account and transaction data under PSD2 for financial data aggregation.
Corporate Expense Management
Automating corporate card reconciliation, expense reporting, and financial management for businesses using the At Work B2B API.
Loyalty Program Integration
Integrating merchant loyalty programs with Membership Rewards points redemption through the Pay with Points and Network Loyalty APIs.
Card-on-File Management
Managing Payment Account References (PAR) to link card numbers and tokens across payment formats for compliant card-on-file services.
Fraud Detection
Using Enhanced Authorization to provide additional risk signals and data points to help merchants detect potentially fraudulent transactions.
Integrations 5
Pre-built integrations with other platforms tell you where this provider already fits in a stack.
Pre-built integrations with other platforms and tools.
EMVCo Tokenization
Integration with EMVCo Payment Account Reference standard, linking PANs and tokens across payment ecosystems.
Merchant Payment Platforms
Integration with e-commerce payment platforms and payment gateways to enable American Express tokenized card acceptance.
Financial Data Aggregators
Integration with open banking data aggregators to provide PSD2-compliant account and transaction data access.
Corporate ERP Systems
Integration with enterprise resource planning and expense management systems via the At Work B2B API.
Loyalty Platform Providers
Integration with third-party loyalty and offer platforms through the Smart Offer Partnership APIs.
Resources
Every other property we hold for American Express — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 5
Portal, sign-up, and the first successful call
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 2
Pagination, idempotency, versioning, errors, and events
Build 3
SDKs, sample code, and the tooling you integrate with
Access & Security 5
Authentication, authorization, and security posture
Operate 3
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
Other 2
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/american-express · machine-readable index on apis.io