The request names Mastercard, so the answer is about Mastercard's own developer portal ; its page was not read, and its indexed actions (get-api-operation-details, get-documentation, get-openfinance-integration-guide) carry no description here. For an ABU (Account Updater) API specifically, no source shows an ABU operation, so confirm the exact product name with Mastercard. Alternatives that help with card-related API work are listed below.
A question back: Do you mean the Mastercard Account Updater (ABU) service, and do you have Mastercard developer access or an OpenAPI spec for it?
- 1
Mastercard Developersmastercard.comverified and signed
Mastercard's official developer portal, offering API operation details and documentation lookup for its APIs; the page was not read, so ABU-specific coverage is unverified.
for agents: POST /payments/aspsps · GET /payments/health · POST /payments/consents/raw
- 2
TrueLayertruelayer.comverified and signed
An open banking payments platform with a payment link API and a custom API call action, relevant to card-free payments rather than Mastercard account updating 15.
for agents: get-payment-provider · get-payment-link · custom_api_call
- 3
Stainlessstainless.comverified and signed
Generates SDKs, documentation and MCP servers from an OpenAPI spec, with a search_docs action for working with an API through a client 12.
for agents: stainless-api/upload-openapi-spec-action · invoke_api_endpoint · search_docs
Sources
- 2Stainless - Best-in-class developer interfaces for your APIstainless.com · read 2026-10-30
- 5TrueLayer - Europe's leading open banking platformtruelayer.com · read 2026-10-30
- 12Stainless — Build SDK: declares "stainless-api/upload-openapi-spec-action" (the record we read and signed)unfragile.ai · read 2026-10-24
- 15TrueLayer (Activepieces): declares "get-payment-provider" (the record we read and signed)unfragile.ai · read 2026-10-24
For agents: the 10 actions behind this answer
get-api-operation-details · Mastercard Developers MCP Server found in code, not yet checked
POST /payments/aspsps · Open Banking - Payments initiation service verified and signed
Get list of ASPSPs
getCurrencyRateDataUsingGET · API for the Settlement Currency Rate converter verified and signed
getCurrencyRateData
GetMerchantIdentifiers · Merchant Identifier API V2 verified and signed
Returns merchant descriptor and locator information based on the criteria you provide. Information returned includes merchant DBA name, merchant category code (MCC), street address, city, state, post
GET /merchants/v1/merchant · Locations API verified and signed
Returns merchant location information for merchants offering the following services: accept contactless-enabled cards and devices, allow customers to add money to an eligible MasterCard or Maestro pre
POST /isRoutingValid · Bill Payment Validator verified and signed
Bill Payment Validator service returns the processing status for a potential RPPS transaction
GET /binlisting · MasterCard Bin Table Listing verified and signed
BIN Table Listing file
POST /fraud/merchant/v3/termination-inquiry · MATCH API verified and signed
Returns information on merchants that have been terminated and merchants that have inquired upon. Provides the acquiring bank with information, such as, if a Merchant or individual has been terminated
GET /systemstatus · MDES Customer Service verified and signed
Returns the overall system status of the Mastercard Digital Enablement Service.
GET /parameters · Spending Pulse verified and signed
Returns a distinct list of all reports are available and that one is subscribed to.
Labels are the instruments' verdict and are never changed by ranking. Agents and robots get this same answer as JSON at /api/v1/find?q=…&answer=1 and through the MCP server.