Relace

Relace builds purpose-built AI models and infrastructure for coding agents. Its hosted API exposes fast, specialized models — Instant Apply (relace-apply-3) for merging LLM code edits at over 10k tok/s, a Code Reranker (relace-rank) and code embeddings for semantic codebase retrieval, and Compact for compressing agent traces — alongside Relace Repos, a "GitHub for AI agents" source-control layer with built-in two-stage retrieval and Fast Agentic Search. Authentication is a Bearer API key (rlc- prefix); official Python and TypeScript SDKs and an MCP server are published, and enterprise SOC 2, on-premise, and VPC-isolated deployments are offered. Backed by Matrix Partners and Y Combinator.

Relace publishes 2 APIs on the APIs.io network: Code API and Repo API. Tagged areas include Company, Artificial Intelligence, Coding Agents, Code Generation, and Developer Tools.

Relace’s developer surface includes documentation, API reference, getting-started guide, quickstart, signup flow, pricing, engineering blog, and 23 more developer resources.

🌐 Visit website 📡 Source on GitHub

44.5/100 developing ▬ flat Agent 37/100 agent ready saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs 1 MCP Servers

Company Artificial Intelligence Coding Agents Code Generation Developer Tools Machine-Learning Code Search LLM

Kin Score

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

Composite quality — 44.5/100 · developing

Contract Quality 11.2 / 23

Developer Ergonomics 12.3 / 18

Access Clarity 7.1 / 18

Operational Transparency 1.2 / 12

Contract Governance 2.0 / 11

Discoverability 6.8 / 9

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 37/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 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

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.

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/relace: 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.

Relace Code API

The Code API from Relace — 5 operation(s) for code.

Relace Repo API

The Repo API from Relace — 5 operation(s) for repo.

Open Collections 3

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Relace Code API

OPEN COLLECTION

Relace Code Repo API

OPEN COLLECTION

MCP Servers 1

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

Relace MCP Server

MCP SERVER

Security Posture 2

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

Relace Authentication

http · 1 scheme

SECURITY

Relace Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Relace Agentic Access

11 operations · 10 acting

AGENTIC

Resources

Get Started 5

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

Quickstart

SignUp

Sandbox

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

OpenAPI

OpenAPI

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer

AgentSkill

LLMsTxt

AgenticAccess

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

ErrorCatalog

Lifecycle

Conventions

Conformance

DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

SDKs

SDKs

Access & Security 3

Authentication, authorization, and security posture

Compliance

Compliance

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

StatusPage

StatusPage

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: relace
name: Relace
description: Relace builds purpose-built AI models and infrastructure for coding agents. Its hosted API exposes fast, specialized
  models — Instant Apply (relace-apply-3) for merging LLM code edits at over 10k tok/s, a Code Reranker (relace-rank) and
  code embeddings for semantic codebase retrieval, and Compact for compressing agent traces — alongside Relace Repos, a "GitHub
  for AI agents" source-control layer with built-in two-stage retrieval and Fast Agentic Search. Authentication is a Bearer
  API key (rlc- prefix); official Python and TypeScript SDKs and an MCP server are published, and enterprise SOC 2, on-premise,
  and VPC-isolated deployments are offered. Backed by Matrix Partners and Y Combinator.
url: https://raw.githubusercontent.com/api-evangelist/relace/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  - sandbox
  generated: '2026-09-03'
  method: derived
image: https://framerusercontent.com/images/D6XFBAXygf3ZHyjrXSmLmItnPI.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- matrix-partners
x-tier: profiled
x-tier-reason: enriched-from-live-api
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Artificial Intelligence
- Coding Agents
- Code Generation
- Developer Tools
- Machine-Learning
- Code Search
- LLM
tags_raw:
- Company
- AI
- Coding Agents
- Code Generation
- Developer Tools
- Machine Learning
- Code Search
- LLM
apis:
- aid: relace:relace-code-api
  name: Relace Code API
  description: The Code API from Relace — 5 operation(s) for code.
  humanURL: https://docs.relace.ai/docs/introduction
  baseURL: https://api.relace.run
  tags:
  - Code
  properties:
  - type: OpenAPI
    url: openapi/relace-code-api-openapi.yml
  - type: Documentation
    url: https://docs.relace.ai/docs/introduction
  - type: APIReference
    url: https://docs.relace.ai/api-reference/introduction
- aid: relace:relace-repo-api
  name: Relace Repo API
  description: The Repo API from Relace — 5 operation(s) for repo.
  humanURL: https://docs.relace.ai/docs/introduction
  baseURL: https://api.relace.run
  tags:
  - Repo
  properties:
  - type: OpenAPI
    url: openapi/relace-repo-api-openapi.yml
  - type: Documentation
    url: https://docs.relace.ai/docs/introduction
  - type: APIReference
    url: https://docs.relace.ai/api-reference/introduction
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DeveloperPortal
  url: https://docs.relace.ai
- type: Documentation
  url: https://docs.relace.ai/docs/introduction
- type: APIReference
  url: https://docs.relace.ai/api-reference/introduction
- type: GettingStarted
  url: https://docs.relace.ai/docs/instant-apply/quickstart
- type: Quickstart
  url: https://docs.relace.ai/docs/instant-apply/quickstart
- type: SignUp
  url: https://app.relace.ai/sign-up
- type: Pricing
  url: https://relace.ai/pricing
- type: Blog
  url: https://relace.ai/blog
- type: TermsOfService
  url: https://relace.ai/legal/terms-of-use
- type: PrivacyPolicy
  url: https://relace.ai/legal/privacy-policy
- type: GitHubOrganization
  url: https://github.com/squack-io
- type: StatusPage
  url: https://status.relace.ai/
- type: Compliance
  url: https://relace.ai/pricing
- type: Authentication
  url: authentication/relace-authentication.yml
- type: OpenAPI
  url: openapi/_original/relace-openapi-original.json
- type: MCPServer
  url: mcp/relace-mcp.yml
- type: Packages
  url: packages/relace-packages.yml
- type: SDKs
  url: packages/relace-packages.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/relace-llms.txt
- type: ErrorCatalog
  url: errors/relace-error-codes.yml
- type: Lifecycle
  url: lifecycle/relace-lifecycle.yml
- type: Conventions
  url: conventions/relace-conventions.yml
- type: Conformance
  url: conformance/relace-conformance.yml
- type: DataModel
  url: data-model/relace-data-model.yml
- type: Sandbox
  url: sandbox/relace-sandbox.yml
- type: Overlay
  url: overlays/relace-overlay.yaml
- type: AgenticAccess
  url: agentic-access/relace-agentic-access.yml
- type: DomainSecurity
  url: security/relace-domain-security.yml
- type: Website
  url: https://relace.ai
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 16
  pass: local-v1

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