Skymerse

Skymerse is a Y Combinator-backed aviation company building one AI system for airline flight operations — from planning and monitoring in the operations center to real-time support in the cockpit. Its first product, Notamify, interprets NOTAMs (Notices to Airmen) with specialized aeronautical models and ships the Notamify API V2: a REST API over global NOTAM data with AI-enhanced interpretation, active/nearby/raw/archive NOTAM endpoints, AI NOTAM prioritisation, synchronous and asynchronous flight briefings, and a Watcher API that pushes matching interpreted NOTAMs to signed webhooks. Notamify already serves airline customers and thousands of pilots and aviation professionals, with an official Python SDK and an MCP server for agents.

Skymerse publishes 1 API contract indexed on the APIs.io network: Notams API. Tagged areas include Company, Aviation, NOTAM, Flight Operations, and Aeronautical.

The Skymerse catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

Skymerse’s developer surface includes authentication, changelog, sandbox, documentation, API reference, getting-started guide, engineering blog, and 22 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

58.4/100 strong ▬ flat Agent 34/100 agent ready Heartbeat 100/100 alive saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessPaid

1 published contract 1 MCP Servers 3 Agent Skills

Company Aviation NOTAMFlight OperationsAeronauticalWeather Artificial Intelligence Webhook

Kin Score

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

Composite quality — 58.4/100 · strong

Contract Quality 10.2 / 19

Developer Ergonomics 11.0 / 15

Access Clarity 11.1 / 15

Operational Transparency 4.6 / 10

Contract Governance 1.6 / 9

Discoverability 5.4 / 8

Regulatory Posture 2.9 / 15

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 34/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 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 6 / 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 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/.

Show this score on your site.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/skymerse/"><img src="https://apis.io/badge/skymerse/card.svg" alt="Skymerse on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

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

Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
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)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
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)
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too

5 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 54.6 — up to +11.4 composite points
Contract Governance scores 18.2 — up to +9.8 composite points
Operational Transparency scores 47.4 — up to +6.8 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/skymerse/apis.yml: open an issue on github.com/api-evangelist/skymerse 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
Weather and Climate Data	undeclared	-	-	-
Air Traffic and Aviation Data (manned aviation, ATM, airport suppliers)	undeclared	-	-	-

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 (documented)

OpenAPI

measured — observed by APIs.io (published)

APIs 1

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

Skymerse Notams API

The Notams API from Skymerse — 9 operation(s) for notams.

Open Collections 1

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

Notamify API V2 Notams API

OPEN COLLECTION

MCP Servers 1

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

Skymerse MCP Server

Local (stdio) MCP server; 2 tools listed.

MCP SERVER

Agent Skills 3

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

Generate an AI flight briefing

AGENT SKILL

Get active NOTAMs for airports

AGENT SKILL

Subscribe to NOTAM changes via the Watcher API

AGENT SKILL

Skymerse API pricing

Prices published by Skymerse, read 2026-10-07 from skymerse.gitbook.io/notamify-api/basics/notamify-api-cred....

Plan	Price
Intro	$15 Includes: 50 Included Calls
Growth	$79 Includes: 300 Included Calls
Scale	$199 Includes: 1,000 Included Calls

Plan details, limits and sources →

Rate limits

: minute
: minute

Rate-limit details →

Billed by: package · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Skymerse Plans Pricing

3 plans

PLANS

Skymerse Price Estimates

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Skymerse Rate Limits

2 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

Skymerse

SLA

FinOps 1

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

Skymerse Finops

FINOPS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Skymerse Watcher Webhooks

ASYNCAPI

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Skymerse API Rules

62 rules · 57 errors 3 warnings 2 info

SPECTRAL

OpenAPI Overlays 1

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Skymerse Notamify Overlay

11 actions · update · skymerse-notamify-openapi-original.json

DERIVED

Security Posture 2

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

Skymerse Authentication

http · 1 scheme

SECURITY

Skymerse Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 4

Portal, sign-up, and the first successful call

Sandbox

DeveloperPortal

GettingStarted

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

MCPServer

LLMsTxt

WellKnown

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Conformance

Webhooks

DataModel

Build 3

SDKs, sample code, and the tooling you integrate with

Packages

Packages

SDKs

SDKs

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

RateLimits

RateLimits

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

PrivacyPolicy

PrivacyPolicy

Pricing

Pricing

Company 1

The organization behind the API

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Overlay

Overlay

Source (apis.yml)

aid: skymerse
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: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  - sandbox
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/skymerse.png
name: Skymerse
description: 'Skymerse is a Y Combinator-backed aviation company building one AI system for airline flight operations — from
  planning and monitoring in the operations center to real-time support in the cockpit. Its first product, Notamify, interprets
  NOTAMs (Notices to Airmen) with specialized aeronautical models and ships the Notamify API V2: a REST API over global NOTAM
  data with AI-enhanced interpretation, active/nearby/raw/archive NOTAM endpoints, AI NOTAM prioritisation, synchronous and
  asynchronous flight briefings, and a Watcher API that pushes matching interpreted NOTAMs to signed webhooks. Notamify already
  serves airline customers and thousands of pilots and aviation professionals, with an official Python SDK and an MCP server
  for agents.'
url: https://raw.githubusercontent.com/api-evangelist/skymerse/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- y-combinator
x-tier: profiled
x-tier-reason: enriched-from-stub
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
x-docs-platform: gitbook
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-04
tags:
- Company
- Aviation
- NOTAM
- Flight Operations
- Aeronautical
- Weather
- Artificial Intelligence
- Webhook
tags_raw:
- Company
- Aviation
- NOTAM
- Flight Operations
- Aeronautical
- Weather
- AI
- Webhooks
apis:
- aid: skymerse:skymerse-notams-api
  name: Skymerse Notams API
  description: The Notams API from Skymerse — 9 operation(s) for notams.
  humanURL: https://skymerse.gitbook.io/notamify-api
  baseURL: https://api.notamify.com/api/v2
  tags:
  - NOTAMs
  tags_raw:
  - Notams
  properties:
  - type: OpenAPI
    url: openapi/skymerse-notams-api-openapi.yml
  - type: Webhooks
    url: asyncapi/skymerse-watcher-webhooks.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/skymerse-plans-pricing.yml
- type: DomainSecurity
  url: security/skymerse-domain-security.yml
- type: Authentication
  url: authentication/skymerse-authentication.yml
- type: Packages
  url: packages/skymerse-packages.yml
- type: SDKs
  url: packages/skymerse-packages.yml
- type: MCPServer
  url: mcp/skymerse-mcp.yml
- type: LLMsTxt
  url: llms/skymerse-llms.txt
- type: WellKnown
  url: well-known/skymerse-well-known.yml
- type: Conventions
  url: conventions/skymerse-conventions.yml
- type: ErrorCatalog
  url: errors/skymerse-problem-types.yml
- type: Lifecycle
  url: lifecycle/skymerse-lifecycle.yml
- type: ChangeLog
  url: changelog/skymerse-changelog.yml
- type: RateLimits
  url: rate-limits/skymerse-rate-limits.yml
- type: Conformance
  url: conformance/skymerse-conformance.yml
- type: Webhooks
  url: asyncapi/skymerse-watcher-webhooks.yml
- type: Sandbox
  url: sandbox/skymerse-sandbox.yml
- type: DataModel
  url: data-model/skymerse-data-model.yml
- type: Overlay
  url: overlays/skymerse-notamify-overlay.yaml
- type: AgentSkill
  url: skills/_index.yml
- type: DeveloperPortal
  url: https://skymerse.gitbook.io/notamify-api
- type: Documentation
  url: https://skymerse.gitbook.io/notamify-api
- type: APIReference
  url: https://skymerse.gitbook.io/notamify-api/active-notams-endpoint
- type: GettingStarted
  url: https://skymerse.gitbook.io/notamify-api/basics/quick-start
- type: Blog
  url: https://notamify.com/blog
- type: GitHubOrganization
  url: https://github.com/skymerse
- type: PrivacyPolicy
  url: https://www.skymerse.com/privacy
- type: Pricing
  url: https://skymerse.gitbook.io/notamify-api/basics/notamify-api-credits-and-costs
- type: SignUp
  url: https://notamify.com/api-manager
- type: Support
  url: https://www.skymerse.com/contact
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 21
  pass: local-v1

Skymerse API — frequently asked questions

Does Skymerse have an API?

Yes. APIs.io lists 1 API from Skymerse, including Skymerse Notams API.

Is there an OpenAPI specification for the Skymerse API?

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

How do I authenticate with the Skymerse API?

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

How much does the Skymerse API cost?

Skymerse publishes its prices; its Intro plan is $15 as of 2026-10-07. APIs.io lists 3 pricing plans for Skymerse, with each plan's price, limits and inclusions under Pricing on this page.

Does Skymerse have an MCP server?

Yes. APIs.io lists 1 MCP server for Skymerse: Local (stdio) MCP server; 2 tools listed.

Is the Skymerse API ready for AI agents?

Skymerse has a Kin Score of 58.4 out of 100 (strong) and an Agent Readiness score of 33.8 (agent-ready), 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

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 →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/skymerse"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/skymerse/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/skymerse/evidence"

Calls without X-API-Key need no key. Calls with it need a paid plan — get a key.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.