Acinq

ACINQ is a Paris-based Bitcoin technology company and one of the principal implementers of the Lightning Network. It builds and maintains eclair, a Scala Lightning node with a 56-method JSON/HTTP API used for routing and channel management at scale; phoenixd, a self-custodial Lightning server daemon that exposes a 27-endpoint HTTP API plus websocket and HMAC-signed webhooks for merchants and applications; the Phoenix self-custodial mobile wallet; and the Kotlin Multiplatform libraries lightning-kmp, bitcoin-kmp and secp256k1-kmp published to Maven Central. ACINQ also operates its own mainnet and testnet Lightning nodes and acts as a liquidity service provider. Every API is self-hosted software rather than a vendor-hosted SaaS endpoint.

Acinq publishes 2 APIs on the APIs.io network. Tagged areas include Company, Blockchain, Bitcoin, Lightning Network, and Payments.

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

Acinq’s developer surface includes documentation, API reference, getting-started guide, support, engineering blog, pricing, changelog, and 23 more developer resources.

🌐 Visit website 📡 Source on GitHub

48.9/100 developing ▬ flat Agent 25/100 agent aware Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

2 APIs

Company Blockchain Bitcoin Lightning Network Payments Open-Source Self-CustodyNode SoftwareCryptocurrency Developer Tools

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 48.9/100 · developing

Contract Quality 8.8 / 21

Developer Ergonomics 13.0 / 17

Access Clarity 5.4 / 17

Operational Transparency 4.1 / 11

Contract Governance 1.9 / 10

Discoverability 6.5 / 9

Regulatory Posture 7.3 / 15

Agent readiness — 25/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 0 / 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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

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/. 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/acinq: 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 2

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

phoenixd HTTP API

The HTTP API of phoenixd, ACINQ's self-custodial Lightning server daemon. 27 documented endpoints covering Bolt11 invoices, Bolt12 offers, Lightning addresses, on-chain sends an...

Eclair JSON API

The JSON/HTTP API of eclair, ACINQ's Scala implementation of the Lightning Network. 56 documented methods grouped into node info, connections, channel open/close/splice/RBF, pee...

Pricing Plans 1

Published pricing tiers and plan structures.

Acinq Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Acinq Rate Limits

0 limits

RATE LIMITS

Event Specifications 1

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

Acinq Phoenixd Webhooks

ASYNCAPI

Security Posture 3

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

Acinq Authentication

http · 5 schemes

SECURITY

Acinq Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Acinq Vulnerability Disclosure

Hackerone · contact published

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Sandbox

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

DataModel

Webhooks

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

SDKs

CLI

Access & Security 4

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Security

Security

VulnerabilityDisclosure

VulnerabilityDisclosure

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

Support

Support

ChangeLog

ChangeLog

RateLimits

RateLimits

Commercial 5

Pricing, plans, and the legal terms of use

License

TermsOfService

PrivacyPolicy

Pricing

Plans

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: acinq
name: Acinq
description: ACINQ is a Paris-based Bitcoin technology company and one of the principal implementers of the Lightning Network.
  It builds and maintains eclair, a Scala Lightning node with a 56-method JSON/HTTP API used for routing and channel management
  at scale; phoenixd, a self-custodial Lightning server daemon that exposes a 27-endpoint HTTP API plus websocket and HMAC-signed
  webhooks for merchants and applications; the Phoenix self-custodial mobile wallet; and the Kotlin Multiplatform libraries
  lightning-kmp, bitcoin-kmp and secp256k1-kmp published to Maven Central. ACINQ also operates its own mainnet and testnet
  Lightning nodes and acts as a liquidity service provider. Every API is self-hosted software rather than a vendor-hosted
  SaaS endpoint.
url: https://raw.githubusercontent.com/api-evangelist/acinq/refs/heads/main/apis.yml
deliveryModel:
  model: unknown
  open_source: unknown
  commercial: true
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - pricing
  - repository-unlicensed
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-09-03'
  method: derived
image: https://acinq.co/images/acinq-logo.svg
x-type: company
x-source: serena-portfolio
x-api-base-note: 'Both ACINQ APIs are SELF-HOSTED daemons, so no vendor-operated base URL exists and baseURL is templated
  on purpose. ACINQ''s published defaults are http://localhost:9740 for phoenixd (--http-bind-ip 127.0.0.1, --http-bind-port
  9740) and http://localhost:8080 for eclair (eclair.api.port). repair-api-bases.py returns verdict `no-usable-base` because
  every candidate is templated; that is the correct measurement of this provider, not a gap to repair. Substituting a real
  ACINQ hostname would assert a hosted endpoint that does not exist. Sources: https://phoenix.acinq.co/server/api and https://acinq.github.io/eclair/.'
specificationVersion: '0.23'
created: '2026-08-17'
modified: '2026-08-17'
tags:
- Company
- Blockchain
- Bitcoin
- Lightning Network
- Payments
- Open-Source
- Self-Custody
- Node Software
- Cryptocurrency
- Developer Tools
tags_raw:
- Company
- Blockchain
- Bitcoin
- Lightning Network
- Payments
- Open Source
- Self-Custody
- Node Software
- Cryptocurrency
- Developer Tools
apis:
- name: phoenixd HTTP API
  description: The HTTP API of phoenixd, ACINQ's self-custodial Lightning server daemon. 27 documented endpoints covering
    Bolt11 invoices, Bolt12 offers, Lightning addresses, on-chain sends and swap-in, payment history, channel management,
    invoice/offer decoding, liquidity fee estimation and the three LNURL flows, plus a payments websocket and configurable
    HMAC-signed webhooks. Authenticated with HTTP Basic using a primary or limited-access password generated on first start.
    The daemon is operated by the integrator, so the base URL is the integrator's own host; the documented default bind is
    127.0.0.1:9740.
  humanURL: https://phoenix.acinq.co/server/api
  baseURL: http://{phoenixd_host}:9740
  tags:
  - Lightning Network
  - Payments
  - Bitcoin
  - Webhook
  tags_raw:
  - Lightning Network
  - Payments
  - Bitcoin
  - Webhooks
  properties:
  - type: APIReference
    url: https://phoenix.acinq.co/server/api
  - type: GettingStarted
    url: https://phoenix.acinq.co/server/get-started
  - type: Documentation
    url: https://phoenix.acinq.co/server
  - type: SourceCode
    url: https://github.com/ACINQ/phoenixd
  - type: Webhooks
    url: asyncapi/acinq-phoenixd-webhooks.yml
- name: Eclair JSON API
  description: 'The JSON/HTTP API of eclair, ACINQ''s Scala implementation of the Lightning Network. 56 documented methods
    grouped into node info, connections, channel open/close/splice/RBF, peers, network graph queries, payments (Bolt11 and
    Bolt12), route finding, on-chain wallet operations, onion messaging, message signing and audit/balance reporting, plus
    a payment-notification websocket at /ws. Requests are HTTP POST form data, responses are JSON, and errors use a uniform
    {"error": "..."} envelope with 400/401/404/500 status codes. Authenticated with HTTP Basic (password only). Self-hosted;
    the documented default port is 8080.'
  humanURL: https://acinq.github.io/eclair/
  baseURL: http://{eclair_host}:8080
  tags:
  - Lightning Network
  - Bitcoin
  - Node Software
  - Routing
  properties:
  - type: APIReference
    url: https://acinq.github.io/eclair/
  - type: Documentation
    url: https://github.com/ACINQ/eclair/blob/master/docs/API.md
  - type: SourceCode
    url: https://github.com/ACINQ/eclair
  - type: ChangeLog
    url: https://github.com/ACINQ/eclair/releases
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: License
  name: Apache-2.0
  url: https://github.com/ACINQ/phoenixd/blob/master/LICENSE
- type: DomainSecurity
  url: security/acinq-domain-security.yml
- type: Website
  url: https://acinq.co/
- type: DeveloperPortal
  url: https://phoenix.acinq.co/server
- type: Documentation
  url: https://acinq.github.io/eclair/
- type: APIReference
  url: https://phoenix.acinq.co/server/api
- type: GettingStarted
  url: https://phoenix.acinq.co/server/get-started
- type: Support
  url: https://phoenix.acinq.co/support
- type: Blog
  url: https://acinq.co/blog
- type: GitHubOrganization
  url: https://github.com/ACINQ
- type: TermsOfService
  url: https://phoenix.acinq.co/terms
- type: PrivacyPolicy
  url: https://phoenix.acinq.co/privacy
- type: Pricing
  url: https://phoenix.acinq.co/server/auto-liquidity
- type: Security
  url: https://github.com/ACINQ/eclair/blob/master/SECURITY.md
- type: VulnerabilityDisclosure
  url: security/acinq-vulnerability-disclosure.yml
- type: ChangeLog
  url: changelog/acinq-changelog.yml
- type: Authentication
  url: authentication/acinq-authentication.yml
- type: Conventions
  url: conventions/acinq-conventions.yml
- type: ErrorCatalog
  url: errors/acinq-problem-types.yml
- type: Lifecycle
  url: lifecycle/acinq-lifecycle.yml
- type: Conformance
  url: conformance/acinq-conformance.yml
- type: DataModel
  url: data-model/acinq-data-model.yml
- type: Packages
  url: packages/acinq-packages.yml
- type: SDKs
  url: packages/acinq-packages.yml
- type: CLI
  url: cli/acinq-cli.yml
- type: Sandbox
  url: sandbox/acinq-sandbox.yml
- type: Plans
  url: plans/acinq-plans-pricing.yml
- type: RateLimits
  url: rate-limits/acinq-rate-limits.yml
- type: Webhooks
  url: asyncapi/acinq-phoenixd-webhooks.yml
- type: LLMsTxt
  url: llms/acinq-llms.txt
x-enrichment:
  date: '2026-08-17'
  status: enriched
  artifacts_added: 18
  pass: local-v1

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