Citi

Citi Payments API

Use the Payments endpoint to initiate and track instant payments. While all payments can be sent through a single CitiConnect API, it is important to observe local country requirements to avoid rejects and returned transactions. The table below shows the minimum fields required to initiate a Thailand Instant Payment transaction. For a full list of fields please refer to the swagger files shared by your Citi representative. To ensure that a payment is initiated correctly: * Ensure you have the required datapoints to initiate a transaction in the country where your payee is located. * Make a ``POST`` request to the `/paymentservices/v1/payments` endpoint and include the required information inside the payload of the request to initiate the transaction.

Documentation GitHub OpenAPI

Operations 7

POST /payments/reconfirmations Payment Reconfirmation #

POST /payments/stops Payment Cancellation #

POST /paymentservices/v1/payments Initiate an outgoing instant payment credit transfer #

GET /paymentservices/v1/payments Inquire for the latest status of transations matching additional parameters #

GET /paymentservices/v1/payments/{uetr} Inquire for the latest status of a transaction using UETR #

POST /payments Make a payment #

GET /payments/{payment-Id} Get a payment #

Documentation

https://developer.citi.com/apidocs/authentication/authentication-only-guide

https://developer.citi.com/apidocs/authentication/authentication-api-reference

https://raw.githubusercontent.com/api-evangelist/citi/refs/heads/main/authentication/citi-authentication.yml

https://developer.citi.com/apidocs/account-reporting/balances/balances-overview

https://developer.citi.com/apidocs/account-reporting/balances/balances-api-reference

https://developer.citi.com/apidocs/outgoing-payments/payments/payments-overview

https://developer.citi.com/apidocs/outgoing-payments/payments/payments-api-reference

https://developer.citi.com/apidocs/accept-payments/online-payment-acceptance/online-payment-acceptance-overview

https://developer.citi.com/apidocs/accept-payments/online-payment-acceptance/online-payment-acceptance-api-reference

https://developer.citi.com/apidocs/commercial-cards/virtual-cards/commercial-cards-overview

https://developer.citi.com/apidocs/commercial-cards/virtual-cards/virtual-cards-api-reference

https://developer.citi.com/apidocs/fx/gateway/citifx-gateway-overview

https://developer.citi.com/apidocs/fx/instant-fx/instant-fx-overview

https://developer.citi.com/apidocs/custody/accounts/accounts-overview

https://developer.citi.com/apidocs/custody/safekeeping-positions/safekeeping-positions-api-reference

https://developer.citi.com/apidocs/transfer-agency/accounts/accounts-overview

https://developer.citi.com/apidocs/transfer-agency/accounts/accounts-api-reference

https://developer.citi.com/apidocs/open-banking/ukraine-open-banking/ukraine-open-banking-overview

https://developer.citi.com/apidocs/open-banking/ukraine-open-banking/ukraine-bank-data-sharing-api-reference

https://developer.citi.com/apidocs/trade/standby-letters-of-credit/trade-overview

https://developer.citi.com/apidocs/trade/standby-letters-of-credit/trade-api-reference

https://developer.citi.com/apidocs/gateway-services/gateway-services-user-guide

https://developer.citi.com/apidocs/gateway-services/gateway-services-api-reference

https://developer.citi.com/apidocs/additional-payment-services/additional-payment-services/additional-payment-services-overview

https://developer.citi.com/apidocs/additional-payment-services/additional-payment-services/additional-payment-services-api-reference

Specifications

https://raw.githubusercontent.com/api-evangelist/citi/refs/heads/main/openapi/citi-payments-api-openapi.yml

Other Resources

https://raw.githubusercontent.com/api-evangelist/citi/refs/heads/main/conventions/citi-conventions.yml

https://raw.githubusercontent.com/api-evangelist/citi/refs/heads/main/errors/citi-problem-types.yml

https://raw.githubusercontent.com/api-evangelist/citi/refs/heads/main/sandbox/citi-sandbox.yml

https://raw.githubusercontent.com/api-evangelist/citi/refs/heads/main/asyncapi/citi-webhooks.yml

https://raw.githubusercontent.com/api-evangelist/citi/refs/heads/main/errors/citi-decline-codes.yml

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this

find_apisBrowse and filter every API in the catalog.
get_api_artifactsOne API's artifacts, grouped by type.
get_openapiThe primary OpenAPI for this API.
find_similar_apisAPIs that look like this one.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

All 92 tools →

Call it yourself

curl for this page

This API

curl "https://apis.io/api/v1/apis/citi-payments-api"

All apis

curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.

OpenAPI Specification

openapi: 3.2.0
info:
  title: Citi Payments API
  x-refined-note:
  - x-ibm-name differs across the merged source definitions and was not carried
  version: '1.0'
  description: 'Operations tagged Payments across 4 of this provider''s published API definitions: citi-payment-reconfirmation-openapi.yaml, citi-paymentcancellation-json-openapi.yaml, express_payments_api.yaml, ukraine_payment_service_initiation_api.yaml. Each path carries the servers of the definition it was published in.'
servers:
- url: https://tts.apib2b.citi.com/citiconnect/prod/paymentservices/v3
  description: production gateway URL
- url: https://tts.apib2b.citi.com/citiconnect/sb/paymentservices/v3
  description: sandbox URL
- url: https://b2b.api.icg.citi.com/citiconnect/prod
  description: production gateway url
- url: https://sandbox.b2b.api.icg.citi.com/citiconnect/sb
  description: 'sbox url '
- url: https://b2b.tts.icgservices.citi.com/citiconnect/openbanking/ukr/paymentconsentservices/v1
  description: production gateway url
- url: https://sanbox.tts.icgservices.citi.com/citiconnect/openbanking/ukr/paymentconsentservices/v1
  description: sbox url
tags:


# --- truncated at 32 KB (636 KB total) ---
# Full source: https://raw.githubusercontent.com/api-evangelist/citi/refs/heads/main/openapi/citi-payments-api-openapi.yml