tRPC

tRPC is a TypeScript framework for building end-to-end typesafe APIs without code generation or schemas. It leverages TypeScript's type inference to provide full static typesafety and autocompletion between client and server, with zero runtime dependencies. tRPC v11 supports queries, mutations, and subscriptions via HTTP GET/POST and WebSocket adapters for Express, Fastify, Next.js, AWS Lambda, and edge runtimes.

tRPC publishes 1 API contract indexed on the APIs.io network: Procedures API. Tagged areas include API Composition, API Framework, BFF, End-to-End Type Safety, and RPC.

The tRPC catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

tRPC’s developer surface includes authentication, documentation, engineering blog, and 17 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

43.9/100 developing ▬ flat Agent 22/100 agent aware Front door AI 2/6 trace self hosted · MIT Full breakdown ↓
scored 2026-10-23 · rubric v0.25.0 · Show this score on your site →

AccessFreemiumSelf serve

1 published contract

API CompositionAPI FrameworkBFFEnd-to-End Type SafetyRPC TypeScript

Kin Score

Kin Score How this is scored →
scored 2026-10-23 · rubric v0.25.0

Composite quality — 43.9/100 · developing

Contract Quality 9.6 / 16

Developer Ergonomics 5.3 / 13

Access Clarity 1.0 / 13

Operational Transparency 3.1 / 8

Contract Governance 2.1 / 8

Discoverability 4.8 / 7

Regulatory Posture 2.5 / 15

Open Source Surface 8.5 / 10

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 22/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) 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.

Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against 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 65 points between them, because both conditional facets apply and carry 35 points together. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 65% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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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/trpc: 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Agent Skills (SKILL.md packages)	undeclared	-	-	1

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

RPC

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 1

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

tRPC Procedures API

tRPC procedures exposed as REST endpoints

Open Collections 2

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

tRPC OpenAPI Example Procedures API

OPEN COLLECTION

tRPC OpenAPI Example

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Trpc Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Trpc Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Trpc Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Trpc Context

19 classes · 0 properties

JSON-LD

Spectral Rules 2

Spectral governance rulesets for linting and validating these APIs.

tRPC — jsonschema rules

5 rules · 4 warnings 1 info

SPECTRAL

tRPC API Rules

8 rules · 3 errors 2 warnings

SPECTRAL

JSON Schema 2

Standalone JSON Schema definitions for this provider's data models.

tRPC Error

1 properties

JSON SCHEMA

tRPC Procedure

3 properties

JSON SCHEMA

JSON Structure 1

JSON Structure definitions describing this provider's data shapes.

Trpc Router Structure

0 properties

JSON STRUCTURE

Examples 2

Example request and response payloads for these APIs.

Trpc Mutation Procedure Example

3 fields

EXAMPLE

Trpc Query Procedure Example

3 fields

EXAMPLE

Security Posture 2

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

Trpc Authentication

http · 1 scheme

SECURITY

Trpc Domain Security

TLSv1.3 · HSTS · DNSSEC

SECURITY

Agentic Access 1

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

Trpc Agentic Access

4 operations · 2 acting

AGENTIC

Resources

Documentation 2

Reference material describing how the API behaves

ContributionGuide

ContributionGuide

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

GitHubRepository

GitHubRepository

NPM

NPM

Access & Security 3

Authentication, authorization, and security posture

SecurityPolicy

SecurityPolicy

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 4

Status, limits, changes, and where to get help

RateLimits

IssueTracker

Releases

Discord

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

License

License

Company 3

The organization behind the API

Website

Website

Twitter

Twitter

Blog

Blog

Source (apis.yml)

aid: trpc
name: tRPC
description: tRPC is a TypeScript framework for building end-to-end typesafe APIs without code generation or schemas. It leverages
  TypeScript's type inference to provide full static typesafety and autocompletion between client and server, with zero runtime
  dependencies. tRPC v11 supports queries, mutations, and subscriptions via HTTP GET/POST and WebSocket adapters for Express,
  Fastify, Next.js, AWS Lambda, and edge runtimes.
type: Index
deliveryModel:
  model: self-hosted
  license: MIT
  open_source: true
  commercial: false
  callable_host: false
  label: Self-hosted open source · you run it yourself
  confidence: high
  source:
  - license
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Freemium · Self-serve signup
  confidence: medium
  try_now_blocked_by: example-domain
  source:
  - plans
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/trpc.png
x-docs-platform: docusaurus
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-17
tags:
- API Composition
- API Framework
- BFF
- End-to-End Type Safety
- RPC
- TypeScript
url: https://raw.githubusercontent.com/api-evangelist/trpc/refs/heads/main/apis.yml
created: '2026-03-27'
modified: '2026-05-19'
specificationVersion: '0.23'
apis:
- aid: trpc:trpc-procedures-api
  name: tRPC Procedures API
  description: tRPC procedures exposed as REST endpoints
  humanURL: https://trpc.io/docs/
  baseURL: https://your-server.example.com/api/trpc
  tags:
  - Procedures
  properties:
  - type: OpenAPI
    url: openapi/trpc-procedures-api-openapi.yml
  - type: Documentation
    url: https://trpc.io/docs
  - type: GettingStarted
    url: https://trpc.io/docs/quickstart
  - type: GitHubRepository
    url: https://github.com/trpc/trpc
  - type: SpectralRules
    url: https://raw.githubusercontent.com/api-evangelist/trpc/refs/heads/main/rules/trpc-rules.yml
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/trpc/refs/heads/main/json-schema/trpc-procedure-schema.json
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/trpc/refs/heads/main/json-schema/trpc-error-schema.json
  - type: JSONLDContext
    url: https://raw.githubusercontent.com/api-evangelist/trpc/refs/heads/main/json-ld/trpc-context.jsonld
  - type: Vocabulary
    url: https://raw.githubusercontent.com/api-evangelist/trpc/refs/heads/main/vocabulary/trpc-vocabulary.yml
common:
- type: Plans
  url: plans/trpc-plans-pricing.yml
- type: RateLimits
  url: rate-limits/trpc-rate-limits.yml
- type: FinOps
  url: finops/trpc-finops.yml
- type: IssueTracker
  url: https://github.com/trpc/trpc/issues
- type: Releases
  url: https://github.com/trpc/trpc/releases
- type: SecurityPolicy
  url: https://github.com/trpc/trpc/blob/main/SECURITY.md
- type: ContributionGuide
  url: https://github.com/trpc/trpc/blob/main/CONTRIBUTING.md
- type: License
  name: MIT
  url: https://github.com/trpc/trpc/blob/main/LICENSE
- type: AgenticAccess
  url: agentic-access/trpc-agentic-access.yml
- type: DomainSecurity
  url: security/trpc-domain-security.yml
- type: Authentication
  url: authentication/trpc-authentication.yml
- type: Website
  url: https://trpc.io/
- type: Documentation
  url: https://trpc.io/docs
- type: GitHubOrganization
  url: https://github.com/trpc
- type: GitHubRepository
  url: https://github.com/trpc/trpc
- type: NPM
  url: https://www.npmjs.com/package/@trpc/server
- type: Discord
  url: https://trpc.io/discord
- type: Twitter
  url: https://twitter.com/alexdotjs
- type: LlmsText
  url: https://trpc.io/llms.txt
- url: https://trpc.io/blog/rss.xml
  type: Blog
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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