Coinflow website screenshot

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
59.4/100 strong ▬ flat Agent 62/100 agent native Full breakdown ↓
scored 2026-08-10 · rubric v0.9.1
AccessSelf serve
14 APIs 1 MCP Servers
CompanyCryptoPaymentsStablecoinUSDCCheckoutPayoutsMarketplaceWeb3Fintech

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-10 · rubric v0.9.1
Composite quality — 59.4/100 · strong
Contract Quality 16.4 / 25
Developer Ergonomics 15.1 / 20
Commercial Clarity 8.4 / 20
Operational Transparency 4.4 / 13
Governance 1.4 / 12
Discoverability 9.3 / 10
Agent readiness — 62/100 · agent native
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
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 4 / 4
Consent & Bot Identity 3 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
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.

Coinflow authentication API

The authentication API from Coinflow — 3 operation(s) for authentication.

Coinflow cardTokenization API

The cardTokenization API from Coinflow — 3 operation(s) for cardtokenization.

Coinflow checkout API

The checkout API from Coinflow — 33 operation(s) for checkout.

Coinflow customers API

The customers API from Coinflow — 15 operation(s) for customers.

Coinflow events API

The events API from Coinflow — 1 operation(s) for events.

Coinflow marketplace API

The marketplace API from Coinflow — 11 operation(s) for marketplace.

Coinflow merchant API

The merchant API from Coinflow — 49 operation(s) for merchant.

Coinflow merchantSubscription API

The merchantSubscription API from Coinflow — 4 operation(s) for merchantsubscription.

Coinflow redeem API

The redeem API from Coinflow — 4 operation(s) for redeem.

Coinflow refund API

The refund API from Coinflow — 4 operation(s) for refund.

Coinflow subMerchant API

The subMerchant API from Coinflow — 3 operation(s) for submerchant.

Coinflow subscription API

The subscription API from Coinflow — 7 operation(s) for subscription.

Coinflow utilities API

The utilities API from Coinflow — 3 operation(s) for utilities.

Coinflow withdraw API

The withdraw API from Coinflow — 30 operation(s) for withdraw.

Scroll for all 14

MCP Servers 1

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

coinflow-mcp.yml

MCP SERVER

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Coinflow Webhooks

ASYNCAPI

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Coinflow Authentication

apiKey · 7 schemes

SECURITY

Coinflow Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Coinflow Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Coinflow Agentic Access

180 operations · 129 acting · 3 human-in-the-loop

180 operations · 129 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal
DeveloperPortal
 GettingStarted
GettingStarted
 SignUp
SignUp
 Sandbox
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
LLMsTxt
 WellKnown
WellKnown
 MCPServer
MCPServer
 AgentSkill
AgentSkill
 AgenticAccess
AgenticAccess

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Components
Components
 Conventions
Conventions
 Idempotency
Idempotency
 Lifecycle
Lifecycle
 ErrorCatalog
ErrorCatalog
 Conformance
Conformance
 DataModel
DataModel
 Webhooks
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)

apis.yml Raw ↑ 
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
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: '0.20'
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
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
  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:
  - 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
  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
  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:
  - 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
  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
  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:
  - 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
  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
  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:
  - 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
  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
  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
  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/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