AppSignal

AppSignal provides error tracking, performance monitoring, and host monitoring for modern applications. It offers features like anomaly detection, uptime monitoring, metric dashboards, log management, and distributed tracing across multiple languages including Ruby, Elixir, Node.js, Python, Go, Java, PHP, and Rust. The platform integrates with OpenTelemetry and supports deployment on Vercel, Kubernetes, and AWS CloudWatch, catering to startups, enterprises, and regulated industries with HIPAA compliance and long‑term log storage options.

AppSignal is listed with 1 API on the APIs.io network. Tagged areas include Monitoring, ErrorTracking, Performance, Observability, and SaaS.

The AppSignal catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

AppSignal’s developer surface includes CLI, changelog, documentation, API reference, getting-started guide, pricing, engineering blog, and 24 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

50.7/100 developing Agent 42/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API

MonitoringErrorTrackingPerformance ObservabilitySaaS

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 50.7/100 · developing

Contract Quality 4.9 / 21

Developer Ergonomics 8.5 / 17

Access Clarity 13.4 / 17

Operational Transparency 5.2 / 11

Contract Governance 3.6 / 10

Discoverability 5.6 / 9

Regulatory Posture 4.4 / 15

Agent readiness — 42/100 · 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 0 / 8

Request/Response Examples 7 / 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

A2A Agent Card 8 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 0 / 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.

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):

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)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks
Documented Reversibility +6 pts — a reversal operation in the contract, graded up when a window is documented too

6 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 22.9 — up to +19.3 composite points
Developer Ergonomics scores 50.0 — up to +10.0 composite points
Contract Governance scores 35.6 — up to +7.7 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/appsignal/apis.yml: open an issue on github.com/api-evangelist/appsignal 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 →

APIs 1

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

AppSignal API

AppSignal API as documented publicly: 16 operations. Contract generated from the documentation by API Evangelist (2026-10-27); not the provider's own document.

Pricing Plans 1

Published pricing tiers and plan structures.

Appsignal Plans Pricing

4 plans

PLANS

Semantic Vocabularies 1

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

Appsignal Context

6 classes · 9 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

AppSignal API Rules

10 rules · 8 errors 1 warnings 1 info

SPECTRAL

JSON Schema 6

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

GetApiAppIdMarkersJsonResponse

2 properties

JSON SCHEMA

PostApiAppIdMarkersJsonRequest

1 properties

JSON SCHEMA

PostApiAppIdMarkersJsonResponse

1 properties

JSON SCHEMA

PostApiSourcemapsRequest

6 properties

JSON SCHEMA

PostApiSourcemapsResponse

1 properties

JSON SCHEMA

PostMainAbc123JsResponse

1 properties

JSON SCHEMA

Security Posture 2

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

Appsignal Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Appsignal Trust Center

ISO 27001, HIPAA, GDPR

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

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

WellKnown

WellKnown

Design & Contract 5

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conformance

Build 4

SDKs, sample code, and the tooling you integrate with

CLI

CLI

SDKs

SDKs

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

Compliance

Security

TrustCenter

DomainSecurity

Operate 4

Status, limits, changes, and where to get help

ChangeLog

StatusPage

ChangeLog

Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans

TermsOfService

PrivacyPolicy

Pricing

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: appsignal
name: AppSignal
image: https://www.appsignal.com/api/v2/og?title=Application%20Monitoring%20for%20Ruby%20on%20Rails%2C%20Elixir%2C%20Node.js
description: AppSignal provides error tracking, performance monitoring, and host monitoring for modern applications. It offers
  features like anomaly detection, uptime monitoring, metric dashboards, log management, and distributed tracing across multiple
  languages including Ruby, Elixir, Node.js, Python, Go, Java, PHP, and Rust. The platform integrates with OpenTelemetry and
  supports deployment on Vercel, Kubernetes, and AWS CloudWatch, catering to startups, enterprises, and regulated industries
  with HIPAA compliance and long‑term log storage options.
url: https://raw.githubusercontent.com/api-evangelist/appsignal/refs/heads/main/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-27 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-27'
modified: '2026-10-27'
tags:
- Monitoring
- ErrorTracking
- Performance
- Observability
- SaaS
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/appsignal-plans-pricing.yml
- type: Spectral
  url: rules/appsignal-rules.yml
- type: JSONLD
  url: json-ld/appsignal-context.jsonld
- type: Vocabulary
  url: vocabulary/appsignal-vocabulary.yml
- type: DataModel
  url: data-model/appsignal-data-model.yml
- type: CLI
  url: cli/appsignal-cli.yml
- type: ChangeLog
  url: changelog/appsignal-changelog.yml
- type: Compliance
  url: https://www.appsignal.com/security
- type: Conformance
  url: conformance/appsignal-conformance.yml
- type: LLMsTxt
  url: llms/appsignal-llms.txt
- type: AgentCard
  url: a2a/appsignal-a2a.yml
- type: WellKnown
  url: well-known/appsignal-well-known.yml
- type: Hosts
  url: hosts/appsignal-hosts.yml
- type: Vendors
  url: vendors/appsignal-vendors.yml
- type: SDKs
  url: packages/appsignal-packages.yml
- type: Packages
  url: packages/appsignal-packages.yml
- type: TermsOfService
  url: https://www.appsignal.com/terms
- type: StatusPage
  url: https://status.appsignal.com/
- type: Security
  url: https://www.appsignal.com/security
- type: PrivacyPolicy
  url: https://www.appsignal.com/privacy-policy
- type: GitHubOrganization
  url: https://github.com/appsignal
- type: ChangeLog
  url: https://www.appsignal.com/changelog
- type: TrustCenter
  url: security/appsignal-trust-center.yml
- type: DomainSecurity
  url: security/appsignal-domain-security.yml
- type: Website
  url: https://www.appsignal.com/
- type: Documentation
  url: https://docs.appsignal.com
- type: APIReference
  url: https://docs.appsignal.com/api
- type: GettingStarted
  url: https://docs.appsignal.com/getting-started
- type: Pricing
  url: https://www.appsignal.com/plans
- type: Blog
  url: https://blog.appsignal.com
- type: Support
  url: https://www.appsignal.com/contact
apis:
- aid: appsignal:appsignal-api
  name: AppSignal API
  description: 'AppSignal API as documented publicly: 16 operations. Contract generated from the documentation by API Evangelist
    (2026-10-27); not the provider''s own document.'
  humanURL: https://www.appsignal.com/launch-week/mcp-cli
  baseURL: https://appsignal.com
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/appsignal-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/appsignal-post-api-sourcemaps-request-schema.json
  - type: JSONSchema
    url: json-schema/appsignal-post-api-app-id-markers-json-response-schema.json
  - type: JSONSchema
    url: json-schema/appsignal-post-api-app-id-markers-json-request-schema.json
  - type: JSONSchema
    url: json-schema/appsignal-get-api-app-id-markers-json-response-schema.json
  - type: JSONSchema
    url: json-schema/appsignal-post-api-sourcemaps-response-schema.json
  - type: JSONSchema
    url: json-schema/appsignal-post-main-abc123-js-response-schema.json
x-submission-probe: 200 2026-10-25
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: Docs are served as static markdown via llms.txt with no OpenAPI or other machine‑readable contract.
  evidence:
  - url: https://docs.appsignal.com/
    status: 308
  checked: '2026-10-27'
x-enrichment:
  date: '2026-10-27'
  status: enriched
  artifacts_added: 32
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

AppSignal API — frequently asked questions

Does AppSignal have an API?

Yes. APIs.io lists 1 API from AppSignal, including AppSignal API.

Is there an OpenAPI specification for the AppSignal API?

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

How much does the AppSignal API cost?

APIs.io lists 4 pricing plans for AppSignal, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the AppSignal API ready for AI agents?

AppSignal has a Kin Score of 50.7 out of 100 (developing) and an Agent Readiness score of 42.1 (agent-ready), scored by API Evangelist on 2026-10-31.

Work with this as data

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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.

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Every operation they expose

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How their score was established

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