P2Flux API

Non-custodial USDC payments API on the Base blockchain. Provides REST endpoints for one-time USDC payment intents with on-chain verification, recurring/subscription payments with merchant-triggered charges, and refunds. Payments are authorized per-request via HMAC-signed capabilities plus the payer's EIP-712 wallet signature — no signup, no dashboard, no issued credentials, and no custody of funds.

P2Flux API publishes 6 APIs on the APIs.io network, including Cancellation API, One-time payments API, Recurring payments API, and 3 more. Tagged areas include Payments, Payment API, Cryptocurrency, Stablecoins, and USDC.

P2Flux API’s developer surface includes documentation, getting-started guide, API reference, pricing, support, sandbox, authentication, and 25 more developer resources.

🌐 Visit website 📡 Source on GitHub

44.5/100 developing ▬ flat Agent 35/100 agent ready Front door AI 3/6 light Full breakdown ↓
scored 2026-10-04 · rubric v0.23.0

1 published contract 1 MCP Servers

PaymentsPayment APICryptocurrency Stablecoins USDC Base Recurring Payments Subscription Refunds Non-Custodial

Kin Score

Kin Score How this is scored →
scored 2026-10-04 · rubric v0.23.0

Composite quality — 44.5/100 · developing

Contract Quality 8.7 / 19

Developer Ergonomics 10.6 / 15

Access Clarity 3.9 / 15

Operational Transparency 4.9 / 10

Contract Governance 0.4 / 9

Discoverability 5.1 / 8

Regulatory Posture 3.3 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 35/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 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 Well-Known Document 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.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/p2flux-api: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 6

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

P2Flux API Cancellation API

Unsigned calldata for the customer's own wallet to send.

P2Flux API One-time payments API

A single payment to a single recipient.

P2Flux API Recurring payments API

Signed once by the customer, charged by your renewal job.

P2Flux API Refunds API

A transfer from the merchant's own wallet back to the wallet that paid.

P2Flux API Service API

Liveness.

P2Flux API Subscriptions API

The Subscriptions API from P2Flux API — 1 operation(s) for subscriptions.

MCP Servers 1

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

P2Flux API MCP Server

P2Flux ships no MCP server. This is a DERIVED candidate tool list mapping the public REST operations to prospective MCP tools, provided as a starting point only. Nobody serves t...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

P2Flux Api Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

P2Flux Api Rate Limits

13 limits

RATE LIMITS

Security Posture 2

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

P2Flux Api Authentication

0 schemes

SECURITY

P2Flux Api Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

APIOnboarding

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

WellKnown

MCPServer

AgentSkill

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Components

Conventions

Idempotency

ErrorCatalog

Conformance

Lifecycle

DataModel

Scroll for all 7

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

DeclineCodes

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

StatusPage

StatusPage

Support

Support

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

name: P2Flux API
description: Non-custodial USDC payments API on the Base blockchain. Provides REST endpoints for one-time USDC payment intents
  with on-chain verification, recurring/subscription payments with merchant-triggered charges, and refunds. Payments are authorized
  per-request via HMAC-signed capabilities plus the payer's EIP-712 wallet signature — no signup, no dashboard, no issued
  credentials, and no custody of funds.
url: https://raw.githubusercontent.com/api-evangelist/p2flux-api/refs/heads/main/apis.yml
image: https://p2flux.com/assets/apple-touch-icon.png
created: '2026-09-15'
modified: '2026-09-15'
specificationVersion: '0.21'
tags:
- Payments
- Payment API
- Cryptocurrency
- Stablecoins
- USDC
- Base
- Recurring Payments
- Subscription
- Refunds
- Non-Custodial
tags_raw:
- Payments
- Payment API
- Cryptocurrency
- Stablecoins
- USDC
- Base
- Recurring Payments
- Subscriptions
- Refunds
- Non-Custodial
apis:
- aid: p2flux-api:p2flux-api-cancellation-api
  name: P2Flux API Cancellation API
  description: Unsigned calldata for the customer's own wallet to send.
  humanURL: https://p2flux.com/docs/api.html
  baseURL: https://api.p2flux.com
  tags:
  - Cancellation
  properties:
  - type: OpenAPI
    url: openapi/p2flux-api-cancellation-api-openapi.yml
  - type: Documentation
    url: https://p2flux.com/docs/
  - type: LLMsTxt
    url: https://p2flux.com/llms.txt
  - type: APIReference
    url: https://p2flux.com/docs/api.html
  - type: Authentication
    url: authentication/p2flux-api-authentication.yml
  - type: Conventions
    url: conventions/p2flux-api-conventions.yml
  - type: ErrorCatalog
    url: errors/p2flux-api-problem-types.yml
  - type: DataModel
    url: data-model/p2flux-api-data-model.yml
- aid: p2flux-api:p2flux-api-one-time-payments-api
  name: P2Flux API One-time payments API
  description: A single payment to a single recipient.
  humanURL: https://p2flux.com/docs/api.html
  baseURL: https://api.p2flux.com
  tags:
  - One-Time Payments
  tags_raw:
  - One-time payments
  properties:
  - type: OpenAPI
    url: openapi/p2flux-api-one-time-payments-api-openapi.yml
  - type: Documentation
    url: https://p2flux.com/docs/
  - type: LLMsTxt
    url: https://p2flux.com/llms.txt
  - type: APIReference
    url: https://p2flux.com/docs/api.html
  - type: Authentication
    url: authentication/p2flux-api-authentication.yml
  - type: Conventions
    url: conventions/p2flux-api-conventions.yml
  - type: ErrorCatalog
    url: errors/p2flux-api-problem-types.yml
  - type: DataModel
    url: data-model/p2flux-api-data-model.yml
- aid: p2flux-api:p2flux-api-recurring-payments-api
  name: P2Flux API Recurring payments API
  description: Signed once by the customer, charged by your renewal job.
  humanURL: https://p2flux.com/docs/api.html
  baseURL: https://api.p2flux.com
  tags:
  - Recurring Payments
  tags_raw:
  - Recurring payments
  properties:
  - type: OpenAPI
    url: openapi/p2flux-api-recurring-payments-api-openapi.yml
  - type: Documentation
    url: https://p2flux.com/docs/
  - type: LLMsTxt
    url: https://p2flux.com/llms.txt
  - type: APIReference
    url: https://p2flux.com/docs/api.html
  - type: Authentication
    url: authentication/p2flux-api-authentication.yml
  - type: Conventions
    url: conventions/p2flux-api-conventions.yml
  - type: ErrorCatalog
    url: errors/p2flux-api-problem-types.yml
  - type: DataModel
    url: data-model/p2flux-api-data-model.yml
- aid: p2flux-api:p2flux-api-refunds-api
  name: P2Flux API Refunds API
  description: A transfer from the merchant's own wallet back to the wallet that paid.
  humanURL: https://p2flux.com/docs/api.html
  baseURL: https://api.p2flux.com
  tags:
  - Refunds
  properties:
  - type: OpenAPI
    url: openapi/p2flux-api-refunds-api-openapi.yml
  - type: Documentation
    url: https://p2flux.com/docs/
  - type: LLMsTxt
    url: https://p2flux.com/llms.txt
  - type: APIReference
    url: https://p2flux.com/docs/api.html
  - type: Authentication
    url: authentication/p2flux-api-authentication.yml
  - type: Conventions
    url: conventions/p2flux-api-conventions.yml
  - type: ErrorCatalog
    url: errors/p2flux-api-problem-types.yml
  - type: DataModel
    url: data-model/p2flux-api-data-model.yml
- aid: p2flux-api:p2flux-api-service-api
  name: P2Flux API Service API
  description: Liveness.
  humanURL: https://p2flux.com/docs/api.html
  baseURL: https://api.p2flux.com
  tags:
  - Services
  tags_raw:
  - Service
  properties:
  - type: OpenAPI
    url: openapi/p2flux-api-service-api-openapi.yml
  - type: Documentation
    url: https://p2flux.com/docs/
  - type: LLMsTxt
    url: https://p2flux.com/llms.txt
  - type: APIReference
    url: https://p2flux.com/docs/api.html
  - type: Authentication
    url: authentication/p2flux-api-authentication.yml
  - type: Conventions
    url: conventions/p2flux-api-conventions.yml
  - type: ErrorCatalog
    url: errors/p2flux-api-problem-types.yml
  - type: DataModel
    url: data-model/p2flux-api-data-model.yml
- aid: p2flux-api:p2flux-api-subscriptions-api
  name: P2Flux API Subscriptions API
  description: The Subscriptions API from P2Flux API — 1 operation(s) for subscriptions.
  humanURL: https://p2flux.com/docs/api.html
  baseURL: https://api.p2flux.com
  tags:
  - Subscription
  tags_raw:
  - Subscriptions
  properties:
  - type: OpenAPI
    url: openapi/p2flux-api-subscriptions-api-openapi.yml
  - type: Documentation
    url: https://p2flux.com/docs/
  - type: LLMsTxt
    url: https://p2flux.com/llms.txt
  - type: APIReference
    url: https://p2flux.com/docs/api.html
  - type: Authentication
    url: authentication/p2flux-api-authentication.yml
  - type: Conventions
    url: conventions/p2flux-api-conventions.yml
  - type: ErrorCatalog
    url: errors/p2flux-api-problem-types.yml
  - type: DataModel
    url: data-model/p2flux-api-data-model.yml
maintainers:
- FN: P2Flux
  url: https://github.com/P2Flux
x-generated:
  by: apis.io/add
  model: claude-opus-4-8
  confidence: 97
  at: '2026-09-15T08:19:35.849Z'
common:
- type: Overlay
  url: overlays/p2flux-api-openapi-overlay.yaml
- type: DomainSecurity
  url: security/p2flux-api-domain-security.yml
- type: Website
  url: https://p2flux.com/
- type: DeveloperPortal
  url: https://p2flux.com/docs/
- type: Documentation
  url: https://p2flux.com/docs/
- type: GettingStarted
  url: https://p2flux.com/docs/quickstart.html
- type: APIReference
  url: https://p2flux.com/docs/api.html
- type: Pricing
  url: https://p2flux.com/#pricing
- type: StatusPage
  url: https://p2flux.com/status.html
- type: TermsOfService
  url: https://p2flux.com/terms.html
- type: PrivacyPolicy
  url: https://p2flux.com/privacy.html
- type: Support
  url: https://p2flux.com/integration-enquiries.html
- type: Integrations
  url: https://p2flux.com/integrations.html
- type: GitHubOrganization
  url: https://github.com/P2Flux
- type: LLMsTxt
  url: https://p2flux.com/llms.txt
- type: WellKnown
  url: well-known/p2flux-api-well-known.yml
- type: APIOnboarding
  url: https://p2flux.com/.well-known/api-onboarding
- type: Packages
  url: packages/p2flux-api-packages.yml
- type: SDKs
  url: packages/p2flux-api-packages.yml
- type: Components
  url: components/p2flux-api-components.yml
- type: Sandbox
  url: sandbox/p2flux-api-sandbox.yml
- type: RateLimits
  url: rate-limits/p2flux-api-rate-limits.yml
- type: Plans
  url: plans/p2flux-api-plans-pricing.yml
- type: Conventions
  url: conventions/p2flux-api-conventions.yml
- type: Idempotency
  url: conventions/p2flux-api-conventions.yml
- type: Authentication
  url: authentication/p2flux-api-authentication.yml
- type: ErrorCatalog
  url: errors/p2flux-api-problem-types.yml
- type: DeclineCodes
  url: errors/p2flux-api-decline-codes.yml
- type: Conformance
  url: conformance/p2flux-api-conformance.yml
- type: Lifecycle
  url: lifecycle/p2flux-api-lifecycle.yml
- type: MCPServer
  url: mcp/p2flux-api-mcp.yml
- type: DataModel
  url: data-model/p2flux-api-data-model.yml
- type: AgentSkill
  url: skills/_index.yml
x-enrichment:
  date: '2026-09-15'
  status: enriched
  artifacts_added: 24
  pass: local-v3

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