Finix
Finix is a full-stack payments technology provider that lets software platforms, marketplaces, and merchants accept and send payments online and in person. The Finix API is a HAL/HATEOAS REST API (HTTP Basic authentication per RFC 7617, date-based Finix-Version header, cursor pagination, idempotency_id) covering Identities, Merchants, Payment Instruments, Authorizations, Transfers, Settlements, Disputes, Fee Profiles, Verifications, Onboarding Forms, Devices, Balance Transfers, Split Transfers, and Webhooks, plus low-code Checkout, Payment Links, Subscriptions, and Payouts. It is Level 1 PCI DSS certified with finix.js browser tokenization, native iOS/Android SDKs, and official Python, Node.js, Java, and PHP client libraries. This profile was enriched from Finix's own public developer surface.
Finix publishes 19 APIs on the APIs.io network, including Authorizations API, Balance Transfers API, Compliance Forms API, and 16 more. Tagged areas include Company, Fintech, Payments, Payment Processing, and Payment Facilitation.
The Finix catalog on APIs.io includes 1 event-driven AsyncAPI specification.
Finix’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, signup flow, and 38 more developer resources.
Kin Score
APIs 19
Individual APIs this provider publishes, each with its own machine-readable definition.
Finix Authorizations API
{'$ref': 'api-descriptions/tags/authorizations.md'}
Finix Balance Transfers API
{'$ref': 'api-descriptions/tags/balance-transfers.md'}
Finix Compliance Forms API
{'$ref': 'api-descriptions/tags/compliance-forms.md'}
Finix Devices API
{'$ref': 'api-descriptions/tags/devices.md'}
Finix Disputes API
{'$ref': 'api-descriptions/tags/disputes.md'}
Finix Fee Profiles API
{'$ref': 'api-descriptions/tags/fee-profiles.md'}
Finix Files API
{'$ref': 'api-descriptions/tags/files.md'}
Finix Identities API
{'$ref': 'api-descriptions/tags/identities.md'}
Finix Instrument Updates API
{'$ref': 'api-descriptions/tags/instrument-updates.md'}
Finix Merchant Profiles API
{'$ref': 'api-descriptions/tags/merchant-profiles.md'}
Finix Merchants API
{'$ref': 'api-descriptions/tags/merchants.md'}
Finix Onboarding Forms API
{'$ref': 'api-descriptions/tags/onboarding-forms.md'}
Finix Payment Instruments API
{'$ref': 'api-descriptions/tags/payment-instruments.md'}
Finix Payout Profiles API
{'$ref': 'api-descriptions/tags/payout-profiles.md'}
Finix Settlements API
{'$ref': 'api-descriptions/tags/settlements.md'}
Finix Split Transfers API
{'$ref': 'api-descriptions/tags/split-transfers.md'}
Finix Transfers API
{'$ref': 'api-descriptions/tags/transfers.md'}
Finix Verifications API
{'$ref': 'api-descriptions/tags/verifications.md'}
Finix Webhooks API
{'$ref': 'api-descriptions/tags/webhooks.md'}
Scroll for all 19
Postman Collections 19
Ready-to-run Postman collections for exercising this provider's APIs.
Finix Authorizations API
POSTMANScroll for all 19
Arazzo Workflows 5
Multi-step API workflows described with the Arazzo specification.
_Index
ARAZZOFinix Authorize and Capture
Create a buyer Identity and card, place an Authorization, then capture it.
ARAZZOFinix Onboard Merchant
Create a merchant Identity, attach a bank account, provision the Merchant, and run verification.
ARAZZOFinix Tokenize and Charge
Convert a finix.js token into a Payment Instrument and create a Transfer (sale).
ARAZZOMCP Servers 1
Model Context Protocol servers that expose these APIs to AI agents.
Finix MCP Server
Finix's official remote MCP server (HTTP transport, no auth) exposes live Finix documentation and OpenAPI to MCP clients via tools search, list-apis, get-endpoints, get-endpoint...
MCP SERVERRate Limits 1
Documented rate limits and quota policies.
Finix Rate Limits
RATE LIMITSEvent Specifications 1
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Finix Webhook Events
Finix delivers real-time event notifications via webhooks (HTTP POST) when resources change. Subscribe with POST /webhooks. Each delivery carries an envelope { id, type, entity,...
ASYNCAPISecurity Posture 4
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 5
Portal, sign-up, and the first successful call
Documentation 3
Reference material describing how the API behaves
Agent Surfaces 4
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 13
Pagination, idempotency, versioning, errors, and events
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Build 5
SDKs, sample code, and the tooling you integrate with
Access & Security 6
Authentication, authorization, and security posture
Operate 4
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API