Code

Code is an open, self-custodial payments protocol and mobile wallet built on the Solana blockchain. Its SDK lets any web developer embed a "Pay with Code" button and accept permissionless micropayments — as little as 5 cents per transaction plus a flat 1-cent blockchain fee — with no sign-up required and just a few lines of code. The API is defined as gRPC/Protobuf services (code-protobuf-api): clients sign transaction intents with a self-custodial Ed25519 keypair, payments are created as idempotent payment intents, and completion is confirmed server-side or via JWT-signed webhooks. The entire stack — SDKs (JavaScript, Go, Python, PHP), the Code VM, and the on-chain Solana programs — is open source under the code-payments GitHub org. Code was seeded by Union Square Ventures.

Code publishes 1 API on the APIs.io network. Tagged areas include Company, Payments, Micropayments, Wallets, and Solana.

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

Code’s developer surface includes documentation, API reference, getting-started guide, support, authentication, changelog, and 17 more developer resources.

🌐 Visit website 📡 Source on GitHub

33.8/100 thin ▬ flat Agent 27/100 agent aware library Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessOpen

1 APIs

Company Payments Micropayments Wallets Solana Blockchain Cryptocurrency gRPCSelf-Custodial

Kin Score

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

Composite quality — 33.8/100 · thin

Contract Quality 8.8 / 21

Developer Ergonomics 10.8 / 17

Access Clarity 0.0 / 17

Operational Transparency 2.9 / 11

Contract Governance 0.5 / 10

Discoverability 6.5 / 9

Regulatory Posture 4.0 / 15

Agent readiness — 27/100 · 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 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 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/code: 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 1

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

Code Protobuf API

The Code payments gRPC/Protobuf API — account, currency, messaging, and transaction (intent/swap) services that power the Code wallet and SDK.

Event Specifications 1

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

Code Webhooks

ASYNCAPI

Security Posture 2

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

Code Authentication

self-custodial-keypair/jwt · 2 schemes

SECURITY

Code Domain Security

DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

X-MCPServerCandidate

X-MCPServerCandidate

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 8

Pagination, idempotency, versioning, errors, and events

Components

Conventions

Idempotency

Webhooks

ErrorCatalog

Conformance

DataModel

Lifecycle

Scroll for all 8

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

ChangeLog

ChangeLog

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: code
name: Code
description: 'Code is an open, self-custodial payments protocol and mobile wallet built on the Solana blockchain. Its SDK
  lets any web developer embed a "Pay with Code" button and accept permissionless micropayments — as little as 5 cents per
  transaction plus a flat 1-cent blockchain fee — with no sign-up required and just a few lines of code. The API is defined
  as gRPC/Protobuf services (code-protobuf-api): clients sign transaction intents with a self-custodial Ed25519 keypair, payments
  are created as idempotent payment intents, and completion is confirmed server-side or via JWT-signed webhooks. The entire
  stack — SDKs (JavaScript, Go, Python, PHP), the Code VM, and the on-chain Solana programs — is open source under the code-payments
  GitHub org. Code was seeded by Union Square Ventures.'
url: https://raw.githubusercontent.com/api-evangelist/code/refs/heads/main/apis.yml
deliveryModel:
  model: library
  open_source: false
  commercial: false
  callable_host: false
  label: Library · distributed through package registries, no callable service
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: open
  trial: false
  try_now: false
  public: true
  label: Open access
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://avatars.githubusercontent.com/u/151064663?v=4
x-type: company
x-source: vc-portfolio
x-backed-by:
- union-square-ventures
x-tier: stub
x-tier-reason: portfolio-lead
x-status-note: getcode.com and the hosted gRPC endpoint (api.codeinfra.net) were unreachable at enrichment time (2026-07-18;
  getcode.com CAA forbids cert issuance). The living developer surface is the open-source code-payments GitHub org and its
  GitHub Pages docs; the project has evolved toward the Open Code Protocol (OCP) and Flipcash.
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Payments
- Micropayments
- Wallets
- Solana
- Blockchain
- Cryptocurrency
- gRPC
- Self-Custodial
tags_raw:
- Company
- Payments
- Micropayments
- Wallet
- Solana
- Blockchain
- Cryptocurrency
- gRPC
- Self-Custodial
apis:
- name: Code Protobuf API
  description: The Code payments gRPC/Protobuf API — account, currency, messaging, and transaction (intent/swap) services
    that power the Code wallet and SDK.
  humanURL: https://code-payments.github.io/code-sdk/docs/
  baseURL: https://api.codeinfra.net:443
  tags:
  - Payments
  - gRPC
  - Protobuf
  properties:
  - type: Protobuf
    name: Account service (v1)
    url: grpc/code-account-v1.proto
  - type: Protobuf
    name: Currency service (v1)
    url: grpc/code-currency-v1.proto
  - type: Protobuf
    name: Messaging service (v1)
    url: grpc/code-messaging-v1.proto
  - type: Protobuf
    name: Transaction service (v2)
    url: grpc/code-transaction-v2.proto
  - type: Protobuf
    name: Common models (v1)
    url: grpc/code-common-v1.proto
  - type: Documentation
    url: https://code-payments.github.io/code-sdk/docs/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://getcode.com
- type: DeveloperPortal
  url: https://code-payments.github.io/code-sdk/docs/
- type: Documentation
  url: https://code-payments.github.io/code-sdk/docs/guide/introduction.html
- type: APIReference
  url: https://code-payments.github.io/code-sdk/docs/reference/app.html
- type: GettingStarted
  url: https://code-payments.github.io/code-sdk/docs/guide/quick-start.html
- type: GitHubOrganization
  url: https://github.com/code-payments
- type: Support
  url: https://discord.gg/T8Tpj8DBFp
- type: Packages
  url: packages/code-packages.yml
- type: SDKs
  url: packages/code-packages.yml
- type: Components
  url: components/code-components.yml
- type: Authentication
  url: authentication/code-authentication.yml
- type: Conventions
  url: conventions/code-conventions.yml
- type: Idempotency
  url: conventions/code-conventions.yml
- type: Webhooks
  url: asyncapi/code-webhooks.yml
- type: ErrorCatalog
  url: errors/code-problem-types.yml
- type: Conformance
  url: conformance/code-conformance.yml
- type: DataModel
  url: data-model/code-data-model.yml
- type: Lifecycle
  url: lifecycle/code-lifecycle.yml
- type: ChangeLog
  url: changelog/code-changelog.yml
- type: X-MCPServerCandidate
  url: mcp/code-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: LLMsTxt
  url: llms/code-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: DomainSecurity
  url: security/code-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence

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