Wasmer website screenshot

Wasmer

Wasmer is a WebAssembly runtime, package registry, and edge platform. The Wasmer Registry stores and distributes WebAssembly packages and namespaces, Wasmer Edge deploys those packages as auto-scaling apps, and the wasmer CLI and wasmer.sh interact with the platform through a single public GraphQL API at registry.wasmer.io/graphql.

Wasmer publishes 2 API contracts indexed on the APIs.io network, including Graph QL API, and 1 more. Tagged areas include WebAssembly, Wasm, Registry, Edge, and Runtime.

The Wasmer catalog on APIs.io includes 1 Spectral governance ruleset.

Wasmer’s developer surface includes authentication, documentation, engineering blog, and 9 more developer resources.

31.0/100 thin ▬ flat Agent 25/100 agent aware Front door AI 3/6 light Heartbeat 50/100 alive open core · MIT Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →
AccessFreemiumSelf serve⚡ Free to try
1 published contract
WebAssemblyWasmRegistryEdgeRuntime

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0
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 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 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% 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):
  • MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
  • Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented) Ask about this →
  • Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →
  • A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0 Ask about this →
  • Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document Ask about this →
  • 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) Ask about this →
8 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
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.
Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →
Ask about:
Wasmer · a person reads this and replies by email.
or email info@apis.io
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/wasmer/apis.yml: open an issue on github.com/api-evangelist/wasmer 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 →

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.

measured — observed by APIs.io (published)

APIs 2

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

Wasmer CLI

The wasmer command-line client (wasmer login, publish, deploy, run, ssh) - a first-class consumer of the Registry GraphQL API that wraps publish and Edge deployment workflows.

Wasmer Graph QL API

The Graph QL API from Wasmer — 1 operation(s) for graph ql.

Open Collections 2

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

GraphQL 1

GraphQL schemas published by this provider.

Wasmer Registry GraphQL API

Representative GraphQL schema for the [Wasmer](https://wasmer.io) Registry and Edge

GRAPHQL

Wasmer API pricing

Not yet checked against Wasmer's own pricing page. Compiled by API Evangelist on 2026-06-20 from wasmer.io/pricing; confirm before you rely on a figure. A free plan or tier is listed.

PlanPrice
Hobby free —
Pro paid —
Enterprise & Subhosting enterprise —

Plan details, limits and sources →

Rate limits

Compiled by API Evangelist, not yet checked against Wasmer's documentation. All 5 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

Wasmer Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Wasmer Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs. Counts are the severity each rule declares, not results of running them.

Wasmer API Rules

47 rules · 45 error-severity 1 warn-severity 1 info-severity

SPECTRAL

Security Posture 3

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

Wasmer Authentication

http · 1 scheme

SECURITY

Wasmer Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Wasmer Vulnerability Disclosure

no policy recorded

SECURITY

Agentic Access (API Evangelist recommendations) 1

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

Wasmer Agentic Access

2 operations · 1 acting

2 operations · 1 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

Build 1

SDKs, sample code, and the tooling you integrate with

Access & Security 3

Authentication, authorization, and security posture

Operate 1

Status, limits, changes, and where to get help

Commercial 2

Pricing, plans, and the legal terms of use

Company 3

The organization behind the API

Source (apis.yml)

apis.yml Raw ↑
aid: wasmer
url: https://raw.githubusercontent.com/api-evangelist/wasmer/refs/heads/main/apis.yml
name: Wasmer
kind: company
description: Wasmer is a WebAssembly runtime, package registry, and edge platform. The Wasmer Registry stores and distributes
  WebAssembly packages and namespaces, Wasmer Edge deploys those packages as auto-scaling apps, and the wasmer CLI and wasmer.sh
  interact with the platform through a single public GraphQL API at registry.wasmer.io/graphql.
deliveryModel:
  model: open-core
  license: MIT
  license_evidence:
    repo: wasmerio/wasmer
    spdx: MIT
    stars: 21086
  open_source: true
  commercial: true
  callable_host: true
  label: Open core · an OSS project plus a commercial hosted product
  confidence: medium
  source:
  - openapi
  - pricing
  - repository-license
  generated: '2026-09-25'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Freemium · Self-serve signup
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-13'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/wasmer.png
x-docs-platform: nextra
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-17
tags:
- WebAssembly
- Wasm
- Registry
- Edge
- Runtime
created: '2026-06-20'
modified: '2026-06-20'
specificationVersion: '0.23'
apis:
- aid: wasmer:wasmer-cli
  name: Wasmer CLI
  tags:
  - CLI
  - Tooling
  - Publish
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://docs.wasmer.io/registry/cli
  baseURL: https://registry.wasmer.io/graphql
  properties:
  - url: https://docs.wasmer.io/registry/cli
    type: Documentation
  - url: https://docs.wasmer.io/install
    type: APIReference
  - url: graphql/wasmer-graphql.md
    type: GraphQL
  - url: https://github.com/wasmerio/wasmer
    type: GitHub
  description: The wasmer command-line client (wasmer login, publish, deploy, run, ssh) - a first-class consumer of the Registry
    GraphQL API that wraps publish and Edge deployment workflows.
- aid: wasmer:wasmer-graph-ql-api
  name: Wasmer Graph QL API
  description: The Graph QL API from Wasmer — 1 operation(s) for graph ql.
  humanURL: https://docs.wasmer.io/registry/cli
  baseURL: https://registry.wasmer.io/graphql
  tags:
  - GraphQL
  tags_raw:
  - Graph QL
  properties:
  - type: OpenAPI
    url: openapi/wasmer-graph-ql-api-openapi.yml
  - type: Documentation
    url: https://docs.wasmer.io/graphql-api
  - type: APIReference
    url: https://docs.wasmer.io/registry
  - type: GraphQL
    url: graphql/wasmer-graphql.md
  - type: GitHub
    url: https://github.com/wasmerio/wasmer
  - type: Documentation
    url: https://docs.wasmer.io/registry
  - type: APIReference
    url: https://docs.wasmer.io/registry/manifest
  - type: Documentation
    url: https://docs.wasmer.io/edge
  - type: APIReference
    url: https://docs.wasmer.io/edge/configuration
  - type: Documentation
    url: https://docs.wasmer.io/registry/cli
  - type: APIReference
    url: https://docs.wasmer.io/graphql-api
common:
- type: AgenticAccess
  url: agentic-access/wasmer-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/wasmer-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/wasmer-domain-security.yml
- type: Authentication
  url: authentication/wasmer-authentication.yml
- type: GitHubOrganization
  url: https://github.com/wasmerio
- type: LinkedIn
  url: https://www.linkedin.com/company/wasmer
- type: Website
  url: https://wasmer.io
- type: Documentation
  url: https://docs.wasmer.io
- type: Plans
  url: plans/wasmer-plans-pricing.yml
- type: RateLimits
  url: rate-limits/wasmer-rate-limits.yml
- type: FinOps
  url: finops/wasmer-finops.yml
- type: Blog
  url: https://blog.wasmer.io/feed
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Wasmer API — frequently asked questions

Does Wasmer have an API?

Yes. APIs.io lists 2 APIs from Wasmer, including Wasmer CLI and Wasmer Graph QL API.

Is there an OpenAPI specification for the Wasmer API?

Yes. APIs.io indexes 1 OpenAPI specification for Wasmer, each linked for download from this page.

How do I authenticate with the Wasmer API?

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

How much does the Wasmer API cost?

APIs.io lists 3 pricing plans for Wasmer, with each plan's price, limits and inclusions under Pricing on this page.

Is the Wasmer API ready for AI agents?

Wasmer has a Kin Score of 31.0 out of 100 (thin) and an Agent Readiness score of 24.6 (agent-aware), scored by API Evangelist on 2026-11-13.

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

Tools for providers

9 MCP tools reach this
  • find_providersBrowse and filter every provider in the catalog.
  • get_provider_artifactsEvery artifact this provider publishes, grouped by type.
  • 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.
All 92 tools →

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