Runtime

Runtime (runtm.com) is a Y Combinator-backed platform (Spring 2026) that lets engineering and non-engineering teams safely run coding agents across an organization. It provides sandboxed per-session VMs, session-level observability, and configurable guardrails so teams can ship with agents like Claude Code, OpenAI Codex, and Gemini without breaking production. The hosted Runtime Cloud API (app.runtm.com/api/cloud) exposes sessions, templates, deployments, guardrails, secrets, knowledge and skill directives, and activity telemetry behind scoped bearer-token API keys, with a first-party CLI (runtm) and an agent-focused CLI (runtm-api).

Runtime is listed with 1 API on the APIs.io network. Tagged areas include Company, Coding Agents, Developer Tools, AI Infrastructure, and Sandbox.

Runtime’s developer surface includes documentation, API reference, getting-started guide, engineering blog, support, pricing, signup flow, and 21 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

36.7/100 thin ▬ flat Agent 27/100 agent aware Front door AI 5/6 prominent Heartbeat 86/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API 1 MCP Servers 1 Agent Skills

Company Coding Agents Developer Tools AI Infrastructure Sandbox Agent Orchestration DevOps Cloud

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 36.7/100 · thin

Contract Quality 0.0 / 21

Developer Ergonomics 11.3 / 17

Access Clarity 5.4 / 17

Operational Transparency 5.5 / 11

Contract Governance 0.0 / 10

Discoverability 6.4 / 9

Regulatory Posture 5.3 / 15

Agent readiness — 27/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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.

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/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)

7 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 0.0 — up to +25.0 composite points
Access Clarity scores 31.6 — up to +13.7 composite points
Contract Governance scores 0.0 — up to +12.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/runtime/apis.yml: open an issue on github.com/api-evangelist/runtime to ask a question or point us at an artifact you publish. 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	-	-	2

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 2

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.

Model Context Protocol (MCP)

measured — observed by APIs.io (verified)

Agent Skills

measured — observed by APIs.io (published)

APIs 1

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

Runtime Cloud API

The hosted Runtime Cloud API — manage sandboxed coding-agent sessions, org templates, deployments, guardrails, secrets, knowledge and skill directives, and activity telemetry. A...

MCP Servers 1

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

Runtime MCP Server

Remote MCP server at docs.runtm.com over HTTP; 3 tools listed.

MCP SERVER

Agent Skills 1

Packaged agent skills for driving this provider's APIs from an AI assistant.

runtm

AGENT SKILL

Rate Limits 1

Documented rate limits and quota policies.

Runtime Rate Limits

2 limits

RATE LIMITS

Security Posture 3

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

Runtime Authentication

apiKey · 1 scheme

SECURITY

Runtime Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Runtime Vulnerability Disclosure

Hackerone · contact published

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Runtime Scopes

20 scopes

SCOPES

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conventions

Idempotency

ErrorCatalog

Lifecycle

Build 3

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Packages

Packages

CLI

CLI

Access & Security 5

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

OAuthScopes

OAuthScopes

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 3

Status, limits, changes, and where to get help

Support

Support

RateLimits

RateLimits

ChangeLog

ChangeLog

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: runtime
name: Runtime
description: Runtime (runtm.com) is a Y Combinator-backed platform (Spring 2026) that lets engineering and non-engineering
  teams safely run coding agents across an organization. It provides sandboxed per-session VMs, session-level observability,
  and configurable guardrails so teams can ship with agents like Claude Code, OpenAI Codex, and Gemini without breaking production.
  The hosted Runtime Cloud API (app.runtm.com/api/cloud) exposes sessions, templates, deployments, guardrails, secrets, knowledge
  and skill directives, and activity telemetry behind scoped bearer-token API keys, with a first-party CLI (runtm) and an
  agent-focused CLI (runtm-api).
url: https://raw.githubusercontent.com/api-evangelist/runtime/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - 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
  - scopes
  - rate-limits
  - security
  generated: '2026-11-06'
  method: derived
image: https://runtm.com/og-image.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
x-docs-platform: mintlify
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
tags:
- Company
- Coding Agents
- Developer Tools
- AI Infrastructure
- Sandbox
- Agent Orchestration
- DevOps
- Cloud
tags_raw:
- Company
- Coding Agents
- Developer Tools
- AI Infrastructure
- Sandboxes
- Agent Orchestration
- DevOps
- Cloud
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- name: Runtime Cloud API
  description: The hosted Runtime Cloud API — manage sandboxed coding-agent sessions, org templates, deployments, guardrails,
    secrets, knowledge and skill directives, and activity telemetry. Authenticated with scoped bearer-token API keys (runtm_sk_
    prefix).
  humanURL: https://docs.runtm.com/cloud-api
  baseURL: https://app.runtm.com/api/cloud
  properties:
  - type: Documentation
    url: https://docs.runtm.com/cloud-api
  - type: Authentication
    url: authentication/runtime-authentication.yml
  - type: OAuthScopes
    url: scopes/runtime-scopes.yml
  - type: Conventions
    url: conventions/runtime-conventions.yml
  - type: Idempotency
    url: conventions/runtime-conventions.yml
  - type: ErrorCatalog
    url: errors/runtime-problem-types.yml
  - type: RateLimits
    url: rate-limits/runtime-rate-limits.yml
common:
- type: DomainSecurity
  url: security/runtime-domain-security.yml
- type: Website
  url: https://www.runtm.com/
- type: DeveloperPortal
  url: https://docs.runtm.com
- type: Documentation
  url: https://docs.runtm.com/cloud-api
- type: APIReference
  url: https://docs.runtm.com/cloud-api
- type: GettingStarted
  url: https://docs.runtm.com/quickstart
- type: Blog
  url: https://www.runtm.com/blog
- type: GitHubOrganization
  url: https://github.com/runtm-ai
- type: Support
  url: https://discord.gg/JUuCkUKc
- type: Pricing
  url: https://www.runtm.com/pricing
- type: SignUp
  url: https://app.runtm.com/login
- type: Login
  url: https://app.runtm.com/login
- type: TermsOfService
  url: https://www.runtm.com/terms
- type: PrivacyPolicy
  url: https://www.runtm.com/privacy
- type: LLMsTxt
  url: llms/runtime-llms.txt
- type: Authentication
  url: authentication/runtime-authentication.yml
- type: OAuthScopes
  url: scopes/runtime-scopes.yml
- type: Conventions
  url: conventions/runtime-conventions.yml
- type: Idempotency
  url: conventions/runtime-conventions.yml
- type: ErrorCatalog
  url: errors/runtime-problem-types.yml
- type: RateLimits
  url: rate-limits/runtime-rate-limits.yml
- type: Lifecycle
  url: lifecycle/runtime-lifecycle.yml
- type: ChangeLog
  url: changelog/runtime-changelog.yml
- type: Packages
  url: packages/runtime-packages.yml
- type: CLI
  url: cli/runtime-cli.yml
- type: AgentSkill
  url: skills/_index.yml
- type: VulnerabilityDisclosure
  url: security/runtime-vulnerability-disclosure.yml
- type: Security
  url: https://github.com/runtm-ai/runtm/blob/main/SECURITY.md
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 14
  pass: local-v1

Runtime API — frequently asked questions

Does Runtime have an API?

Yes. APIs.io lists 1 API from Runtime, including Runtime Cloud API.

How do I authenticate with the Runtime API?

Runtime uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Runtime Authentication.

Does Runtime have an MCP server?

Yes. APIs.io lists 1 MCP server for Runtime: Remote MCP server at docs.runtm.com over HTTP; 3 tools listed.

Is the Runtime API ready for AI agents?

Runtime has a Kin Score of 36.7 out of 100 (thin) and an Agent Readiness score of 26.6 (agent-aware), scored by API Evangelist on 2026-11-06.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

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get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
get_provider_ratingPRO — composite, band, trend and facet scores.
apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
resolveTurn a domain, URL or GitHub org into the provider it belongs to.
find_cohortsEvery scored population of providers in the catalog.

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