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 1 API on the APIs.io network. 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

47.6/100 developing Agent 87/100 agent native Full breakdown ↓
scored 2026-07-20 · rubric v0.4

1 APIs 1 MCP Servers 0 Features

CompanyCryptoPaymentsStablecoinUSDCCheckoutPayoutsMarketplaceWeb3Fintech

API Rating

API Evangelist Rating How this is scored →
scored 2026-07-20 · rubric v0.4

Composite quality — 47.6/100 · developing

Contract Quality 9.4 / 25

Developer Ergonomics 16.1 / 20

Commercial Clarity 8.4 / 20

Operational Transparency 4.4 / 13

Governance 0.0 / 12

Discoverability 9.3 / 10

Agent readiness — 87/100 · agent native

Machine-Readable Contract 18 / 18

Agentic Access Contract 15 / 15

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

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 →

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
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:
- name: Coinflow API
  description: The Coinflow REST API for card / ACH / crypto checkout, tokenization, subscriptions, marketplace onboarding,
    refunds, withdrawals/payouts, and webhooks. 170 operations across 14 tags.
  humanURL: https://docs.coinflow.cash/api-reference
  baseURL: https://api.coinflow.cash/api
  tags:
  - Payments
  - Checkout
  - Payouts
  properties:
  - type: OpenAPI
    url: openapi/coinflow-openapi-original.json
  - 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

Coinflow

API Rating

APIs

Coinflow API

MCP Servers

coinflow-mcp.yml

Event Specifications

Coinflow Webhooks

Resources