Coinflow

Coinflow is a stablecoin-native payments platform (backed by Pantera Capital) that lets software companies and marketplaces accept card, ACH, and crypto/USDC payments and send instant payouts across Solana, EVM, and Stellar rails. Its API covers checkout / pay-ins, PCI-compliant tokenized card-on-file, subscriptions, marketplace sub-merchant onboarding with KYC/KYB, refunds, withdrawals and merchant payouts, and HMAC-signed webhooks. Coinflow ships pre-built UI SDKs for React, React Native, Swift, Android, and Flutter, plus a sandbox environment with published test cards and 3DS triggers.

Coinflow publishes 14 APIs on the APIs.io network, including authentication API, cardTokenization API, checkout API, and 11 more. Tagged areas include Company, Crypto, Payments, Stablecoin, and USDC.

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

Coinflow’s developer surface includes documentation, API reference, getting-started guide, engineering blog, support, signup flow, sandbox, and 29 more developer resources.

🌐 Visit website 📡 Source on GitHub

55.7/100 strong ▬ flat Agent 37/100 agent ready saas Full breakdown ↓
scored 2026-08-30 · rubric v0.17.2

AccessSelf serve

1 APIs 1 MCP Servers

Company Crypto PaymentsStablecoinUSDC Checkout Payouts Marketplace Web3 Fintech

Kin Score

Kin Score How this is scored →
scored 2026-08-30 · rubric v0.17.2

Composite quality — 55.7/100 · strong

Contract Quality 12.7 / 21

Developer Ergonomics 12.4 / 17

Access Clarity 4.9 / 17

Operational Transparency 3.8 / 11

Contract Governance 0.5 / 10

Discoverability 6.5 / 9

Regulatory Posture 12.7 / 15

Agent readiness — 37/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Surface 0 / 5

Regulatory Posture applies to this provider. Its tags matched the Payments regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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/coinflow: 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 14

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

Open Collections 15

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

SignUp

Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

OpenAPI

OpenAPI

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

WellKnown

MCPServer

AgentSkill

AgenticAccess

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Components

Conventions

Idempotency

Lifecycle

ErrorCatalog

Conformance

DataModel

Webhooks

Scroll for all 8

Build 3

SDKs, sample code, and the tooling you integrate with

Packages

Packages

SDKs

SDKs

DeclineCodes

DeclineCodes

Access & Security 6

Authentication, authorization, and security posture

Security

Security

Compliance

Compliance

SecurityTxt

SecurityTxt

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

Support

Support

StatusPage

StatusPage

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: coinflow
name: Coinflow
description: Coinflow is a stablecoin-native payments platform (backed by Pantera Capital) that lets software companies and
  marketplaces accept card, ACH, and crypto/USDC payments and send instant payouts across Solana, EVM, and Stellar rails.
  Its API covers checkout / pay-ins, PCI-compliant tokenized card-on-file, subscriptions, marketplace sub-merchant onboarding
  with KYC/KYB, refunds, withdrawals and merchant payouts, and HMAC-signed webhooks. Coinflow ships pre-built UI SDKs for
  React, React Native, Swift, Android, and Flutter, plus a sandbox environment with published test cards and 3DS triggers.
url: https://raw.githubusercontent.com/api-evangelist/coinflow/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- pantera-capital
x-tier: stub
x-tier-reason: portfolio-lead
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
image: https://coinflow.cash/coinflow-og-image.jpg
tags:
- Company
- Crypto
- Payments
- Stablecoin
- USDC
- Checkout
- Payouts
- Marketplace
- Web3
- Fintech
tags_raw:
- Company
- Crypto
- Payments
- Stablecoin
- USDC
- Checkout
- Payouts
- Marketplace
- Web3
- Fintech
apis:
- aid: coinflow:coinflow-authentication-api
  name: Coinflow authentication API
  description: The authentication API from Coinflow — 3 operation(s) for authentication.
  humanURL: https://docs.coinflow.cash/api-reference
  baseURL: https://api.coinflow.cash/api
  tags:
  - Authentication
  tags_raw:
  - authentication
  properties:
  - type: OpenAPI
    url: openapi/coinflow-authentication-api-openapi.yml
  - type: Documentation
    url: https://docs.coinflow.cash/
  - type: APIReference
    url: https://docs.coinflow.cash/api-reference
- aid: coinflow:coinflow-cardtokenization-api
  name: Coinflow cardTokenization API
  description: The cardTokenization API from Coinflow — 3 operation(s) for cardtokenization.
  humanURL: https://docs.coinflow.cash/api-reference
  baseURL: https://api.coinflow.cash/api
  tags: []
  tags_raw:
  - cardTokenization
  properties:
  - type: OpenAPI
    url: openapi/coinflow-cardtokenization-api-openapi.yml
  - type: Documentation
    url: https://docs.coinflow.cash/
  - type: APIReference
    url: https://docs.coinflow.cash/api-reference
- aid: coinflow:coinflow-checkout-api
  name: Coinflow checkout API
  description: The checkout API from Coinflow — 33 operation(s) for checkout.
  humanURL: https://docs.coinflow.cash/api-reference
  baseURL: https://api.coinflow.cash/api
  tags:
  - checkout
  tags_raw:
  - checkout
  properties:
  - type: OpenAPI
    url: openapi/coinflow-checkout-api-openapi.yml
  - type: Documentation
    url: https://docs.coinflow.cash/
  - type: APIReference
    url: https://docs.coinflow.cash/api-reference
- aid: coinflow:coinflow-customers-api
  name: Coinflow customers API
  description: The customers API from Coinflow — 15 operation(s) for customers.
  humanURL: https://docs.coinflow.cash/api-reference
  baseURL: https://api.coinflow.cash/api
  tags:
  - Customers
  tags_raw:
  - customers
  properties:
  - type: OpenAPI
    url: openapi/coinflow-customers-api-openapi.yml
  - type: Documentation
    url: https://docs.coinflow.cash/
  - type: APIReference
    url: https://docs.coinflow.cash/api-reference
- aid: coinflow:coinflow-events-api
  name: Coinflow events API
  description: The events API from Coinflow — 1 operation(s) for events.
  humanURL: https://docs.coinflow.cash/api-reference
  baseURL: https://api.coinflow.cash/api
  tags:
  - Event
  tags_raw:
  - events
  properties:
  - type: OpenAPI
    url: openapi/coinflow-events-api-openapi.yml
  - type: Documentation
    url: https://docs.coinflow.cash/
  - type: APIReference
    url: https://docs.coinflow.cash/api-reference
- aid: coinflow:coinflow-marketplace-api
  name: Coinflow marketplace API
  description: The marketplace API from Coinflow — 11 operation(s) for marketplace.
  humanURL: https://docs.coinflow.cash/api-reference
  baseURL: https://api.coinflow.cash/api
  tags:
  - Marketplace
  tags_raw:
  - marketplace
  properties:
  - type: OpenAPI
    url: openapi/coinflow-marketplace-api-openapi.yml
  - type: Documentation
    url: https://docs.coinflow.cash/
  - type: APIReference
    url: https://docs.coinflow.cash/api-reference
- aid: coinflow:coinflow-merchant-api
  name: Coinflow merchant API
  description: The merchant API from Coinflow — 49 operation(s) for merchant.
  humanURL: https://docs.coinflow.cash/api-reference
  baseURL: https://api.coinflow.cash/api
  tags:
  - merchant
  tags_raw:
  - merchant
  properties:
  - type: OpenAPI
    url: openapi/coinflow-merchant-api-openapi.yml
  - type: Documentation
    url: https://docs.coinflow.cash/
  - type: APIReference
    url: https://docs.coinflow.cash/api-reference
- aid: coinflow:coinflow-merchantsubscription-api
  name: Coinflow merchantSubscription API
  description: The merchantSubscription API from Coinflow — 4 operation(s) for merchantsubscription.
  humanURL: https://docs.coinflow.cash/api-reference
  baseURL: https://api.coinflow.cash/api
  tags: []
  tags_raw:
  - merchantSubscription
  properties:
  - type: OpenAPI
    url: openapi/coinflow-merchantsubscription-api-openapi.yml
  - type: Documentation
    url: https://docs.coinflow.cash/
  - type: APIReference
    url: https://docs.coinflow.cash/api-reference
- aid: coinflow:coinflow-redeem-api
  name: Coinflow redeem API
  description: The redeem API from Coinflow — 4 operation(s) for redeem.
  humanURL: https://docs.coinflow.cash/api-reference
  baseURL: https://api.coinflow.cash/api
  tags:
  - redeem
  tags_raw:
  - redeem
  properties:
  - type: OpenAPI
    url: openapi/coinflow-redeem-api-openapi.yml
  - type: Documentation
    url: https://docs.coinflow.cash/
  - type: APIReference
    url: https://docs.coinflow.cash/api-reference
- aid: coinflow:coinflow-refund-api
  name: Coinflow refund API
  description: The refund API from Coinflow — 4 operation(s) for refund.
  humanURL: https://docs.coinflow.cash/api-reference
  baseURL: https://api.coinflow.cash/api
  tags:
  - refund
  tags_raw:
  - refund
  properties:
  - type: OpenAPI
    url: openapi/coinflow-refund-api-openapi.yml
  - type: Documentation
    url: https://docs.coinflow.cash/
  - type: APIReference
    url: https://docs.coinflow.cash/api-reference
- aid: coinflow:coinflow-submerchant-api
  name: Coinflow subMerchant API
  description: The subMerchant API from Coinflow — 3 operation(s) for submerchant.
  humanURL: https://docs.coinflow.cash/api-reference
  baseURL: https://api.coinflow.cash/api
  tags: []
  tags_raw:
  - subMerchant
  properties:
  - type: OpenAPI
    url: openapi/coinflow-submerchant-api-openapi.yml
  - type: Documentation
    url: https://docs.coinflow.cash/
  - type: APIReference
    url: https://docs.coinflow.cash/api-reference
- aid: coinflow:coinflow-subscription-api
  name: Coinflow subscription API
  description: The subscription API from Coinflow — 7 operation(s) for subscription.
  humanURL: https://docs.coinflow.cash/api-reference
  baseURL: https://api.coinflow.cash/api
  tags:
  - Subscription
  tags_raw:
  - subscription
  properties:
  - type: OpenAPI
    url: openapi/coinflow-subscription-api-openapi.yml
  - type: Documentation
    url: https://docs.coinflow.cash/
  - type: APIReference
    url: https://docs.coinflow.cash/api-reference
- aid: coinflow:coinflow-utilities-api
  name: Coinflow utilities API
  description: The utilities API from Coinflow — 3 operation(s) for utilities.
  humanURL: https://docs.coinflow.cash/api-reference
  baseURL: https://api.coinflow.cash/api
  tags:
  - Utilities
  tags_raw:
  - utilities
  properties:
  - type: OpenAPI
    url: openapi/coinflow-utilities-api-openapi.yml
  - type: Documentation
    url: https://docs.coinflow.cash/
  - type: APIReference
    url: https://docs.coinflow.cash/api-reference
- aid: coinflow:coinflow-withdraw-api
  name: Coinflow withdraw API
  description: The withdraw API from Coinflow — 30 operation(s) for withdraw.
  humanURL: https://docs.coinflow.cash/api-reference
  baseURL: https://api.coinflow.cash/api
  tags:
  - withdraw
  tags_raw:
  - withdraw
  properties:
  - type: OpenAPI
    url: openapi/coinflow-withdraw-api-openapi.yml
  - type: Documentation
    url: https://docs.coinflow.cash/
  - type: APIReference
    url: https://docs.coinflow.cash/api-reference
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://coinflow.cash/
- type: DeveloperPortal
  url: https://docs.coinflow.cash/
- type: Documentation
  url: https://docs.coinflow.cash/
- type: APIReference
  url: https://docs.coinflow.cash/api-reference
- type: GettingStarted
  url: https://docs.coinflow.cash/guides/getting-started/quickstart
- type: Blog
  url: https://coinflow.cash/blog/
- type: Support
  url: https://coinflow.cash/contact/
- type: SignUp
  url: https://app.coinflow.cash/
- type: TermsOfService
  url: https://coinflow.cash/terms-of-service/
- type: PrivacyPolicy
  url: https://coinflow.cash/privacy-policy/
- type: StatusPage
  url: https://status.coinflow.cash/
- type: Security
  url: https://coinflow.cash/bug-bounty
- type: Compliance
  url: https://docs.coinflow.cash/guides/product-overview/key-concepts
- type: OpenAPI
  url: openapi/_original/coinflow-openapi-original.json
- type: LLMsTxt
  url: llms/coinflow-llms.txt
- type: WellKnown
  url: well-known/coinflow-well-known.yml
- type: SecurityTxt
  url: well-known/coinflow-security.txt
- type: Packages
  url: packages/coinflow-packages.yml
- type: SDKs
  url: packages/coinflow-packages.yml
- type: Components
  url: components/coinflow-components.yml
- type: MCPServer
  url: mcp/coinflow-mcp.yml
- type: Sandbox
  url: sandbox/coinflow-sandbox.yml
- type: Conventions
  url: conventions/coinflow-conventions.yml
- type: Idempotency
  url: conventions/coinflow-conventions.yml
- type: Lifecycle
  url: lifecycle/coinflow-lifecycle.yml
- type: ErrorCatalog
  url: errors/coinflow-problem-types.yml
- type: DeclineCodes
  url: errors/coinflow-decline-codes.yml
- type: Conformance
  url: conformance/coinflow-conformance.yml
- type: DataModel
  url: data-model/coinflow-data-model.yml
- type: Webhooks
  url: asyncapi/coinflow-webhooks.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Overlay
  url: overlays/coinflow-overlay.yaml
- type: VulnerabilityDisclosure
  url: security/coinflow-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/coinflow-domain-security.yml
- type: AgenticAccess
  url: agentic-access/coinflow-agentic-access.yml
- type: Authentication
  url: authentication/coinflow-authentication.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

Work with this as data

Every provider 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 providers

9 MCP tools reach this

find_providersBrowse and filter every provider in the catalog.
get_provider_artifactsEvery artifact this provider publishes, grouped by type.
get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
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 provider

curl "https://apis.io/api/v1/providers/coinflow"

All providers

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

Every operation they expose

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

How their score was established

curl "https://apis.io/api/v1/providers/coinflow/evidence"

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

Get an API key

Free tier, no email required.

GitHub Google LinkedIn

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