Dylibso

Dylibso, Inc. is the company behind Extism, the open-source, cross-language framework for building with WebAssembly (Wasm). Its focus is AI-driven application extensibility: giving developers an off-the-shelf, secure-by-default, fully sandboxed plug-in system that is "just a library import away" and runs almost anywhere, with idiomatic Host SDKs for JavaScript, Python, Rust, Ruby, Go, .NET, PHP, Java, C/C++, OCaml, Haskell, Perl, and Zig. Beyond Extism, Dylibso builds Chicory (a native pure-JVM WebAssembly runtime) and Turbo MCP (formerly mcp.run / XTP), a standards-compliant, self-hosted Model Context Protocol gateway and management platform with OIDC identity integration and audit controls. Dylibso is backed by Felicis.

Dylibso is profiled on the APIs.io network. Tagged areas include Company, WebAssembly, Wasm, Extensibility, and Plug-ins.

Dylibso’s developer surface includes documentation, getting-started guide, engineering blog, support, sandbox, changelog, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

19.1/100 emerging ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyWebAssemblyWasmExtensibilityPlug-insDeveloper ToolsSDKsModel Context ProtocolOpen SourceAI

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 19.1/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 9.6 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 2.7 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/dylibso: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Sandbox

Sandbox

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

SourceCode

Packages

SDKs

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

Support

Support

Community

Community

ChangeLog

ChangeLog

Company 3

The organization behind the API

Website

Website

Blog

Blog

BlogRSS

BlogRSS

Source (apis.yml)

aid: dylibso
name: Dylibso
description: 'Dylibso, Inc. is the company behind Extism, the open-source, cross-language framework for building with WebAssembly
  (Wasm). Its focus is AI-driven application extensibility: giving developers an off-the-shelf, secure-by-default, fully sandboxed
  plug-in system that is "just a library import away" and runs almost anywhere, with idiomatic Host SDKs for JavaScript, Python,
  Rust, Ruby, Go, .NET, PHP, Java, C/C++, OCaml, Haskell, Perl, and Zig. Beyond Extism, Dylibso builds Chicory (a native pure-JVM
  WebAssembly runtime) and Turbo MCP (formerly mcp.run / XTP), a standards-compliant, self-hosted Model Context Protocol gateway
  and management platform with OIDC identity integration and audit controls. Dylibso is backed by Felicis.'
url: https://raw.githubusercontent.com/api-evangelist/dylibso/refs/heads/main/apis.yml
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://avatars.githubusercontent.com/u/109687654?v=4
x-type: company
x-source: vc-portfolio
x-backed-by:
- felicis
x-tier: enriched
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- WebAssembly
- Wasm
- Extensibility
- Plug-ins
- Developer Tools
- SDKs
- Model Context Protocol
- Open Source
- AI
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://dylibso.ai
- type: DeveloperPortal
  url: https://extism.org
- type: Documentation
  url: https://extism.org/docs/overview
- type: GettingStarted
  url: https://extism.org/docs/category/quickstart
- type: Blog
  url: https://extism.org/blog
- type: BlogRSS
  url: https://extism.org/blog/rss.xml
- type: GitHubOrganization
  url: https://github.com/dylibso
- type: SourceCode
  url: https://github.com/extism/extism
- type: Support
  url: https://github.com/extism/extism/discussions
- type: Community
  url: https://discord.gg/cx3usBCWnc
- type: Sandbox
  url: https://playground.extism.org
- type: Packages
  url: packages/dylibso-packages.yml
- type: SDKs
  url: packages/dylibso-packages.yml
- type: ChangeLog
  url: changelog/dylibso-changelog.yml
- type: LLMsTxt
  url: llms/dylibso-llms.txt
- type: DomainSecurity
  url: security/dylibso-domain-security.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence