Astraluno

Astraluno offers a free, browser‑based birth chart calculator that generates detailed astrological readings, including Sun, Moon, and rising sign positions. The service runs entirely client‑side, does not store personal data, and provides a REST‑style API for developers to integrate chart calculations into their applications. It supports up to 60 compute or MCP POST requests per minute per IP and enforces CORS without credentials.

Astraluno publishes 10 API contracts indexed on the APIs.io network, including Chart API, Ingresses API, Lunations API, and 7 more. Tagged areas include Astrology, BirthChart, FreeTool, and Horoscope.

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

🌐 Visit website 📡 Profile data on GitHub

31.6/100 thin Agent 34/100 agent ready Full breakdown ↓
scored 2026-11-02 · rubric v0.26.0 · Show this score on your site →

AccessOpen

1 published contract 1 MCP Servers 10 Agent Skills

Astrology BirthChart FreeTool Horoscope

Kin Score

Kin Score How this is scored →
scored 2026-11-02 · rubric v0.26.0

Composite quality — 31.6/100 · thin

Contract Quality 9.8 / 21

Developer Ergonomics 2.7 / 17

Access Clarity 3.6 / 17

Operational Transparency 2.3 / 11

Contract Governance 1.9 / 10

Discoverability 4.8 / 9

Regulatory Posture 4.3 / 15

Agent readiness — 34/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 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 Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
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)
Typed Event Surface +6 pts — AsyncAPI document, OR webhooks/callbacks objects in the as-published OpenAPI, OR common[].type includes Webhooks

6 more unmet checks in the Agent Readiness table above.

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

Developer Ergonomics scores 16.0 — up to +16.8 composite points
Access Clarity scores 21.1 — up to +15.8 composite points
Contract Quality scores 46.2 — up to +13.5 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/astraluno-com/apis.yml: open an issue on github.com/api-evangelist/astraluno-com 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 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 10

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

Astraluno MCP API

Free, read‑only tropical geocentric astrology and Whole Sign birth charts via MCP JSON‑RPC.

Astraluno Chart API

The Chart API from Astraluno — 1 operation(s) for chart.

Astraluno Ingresses API

The Ingresses API from Astraluno — 1 operation(s) for ingresses.

Astraluno Lunations API

The Lunations API from Astraluno — 1 operation(s) for lunations.

Astraluno Openapi.json API

The Openapi.json API from Astraluno — 1 operation(s) for openapi.json.

Astraluno Places API

The Places API from Astraluno — 1 operation(s) for places.

Astraluno Readings API

The Readings API from Astraluno — 1 operation(s) for readings.

Astraluno Retrogrades API

The Retrogrades API from Astraluno — 1 operation(s) for retrogrades.

Astraluno Sky API

The Sky API from Astraluno — 1 operation(s) for sky.

Astraluno Sun Sign API

The Sun Sign API from Astraluno — 1 operation(s) for sun sign.

Scroll for all 10

MCP Servers 1

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

Astraluno MCP Server

Remote MCP server at astraluno.com.

MCP SERVER

Agent Skills 10

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

chart

AGENT SKILL

ingresses

AGENT SKILL

lunations

AGENT SKILL

openapi

AGENT SKILL

places

AGENT SKILL

readings-kind-key

AGENT SKILL

retrogrades

AGENT SKILL

sky

AGENT SKILL

sun-sign

AGENT SKILL

sun-sign

AGENT SKILL

Scroll for all 10

Pricing Plans 1

Published pricing tiers and plan structures.

Astraluno Com Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Astraluno Com Rate Limits

2 limits

RATE LIMITS

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Astraluno API Rules

41 rules · 30 errors 2 warnings 9 info

SPECTRAL

Security Posture 2

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

Astraluno Com Authentication

0 schemes

SECURITY

Astraluno Com Domain Security

TLSv1.3 · HSTS · DNSSEC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Astraluno Com Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Agentic Access 1

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

Astraluno Com Agentic Access

9 operations · 1 acting

AGENTIC

Resources

Agent Surfaces 4

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgentSkill

LLMsTxt

MCPServer

Design & Contract 3

Pagination, idempotency, versioning, errors, and events

Spectral

Spectral

ErrorCatalog

ErrorCatalog

Conformance

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

ToolCrosswalk

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

PrivacyPolicy

TermsOfService

PrivacyPolicy

TermsOfService

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: astraluno-com
name: Astraluno
description: Astraluno offers a free, browser‑based birth chart calculator that generates detailed astrological readings,
  including Sun, Moon, and rising sign positions. The service runs entirely client‑side, does not store personal data, and
  provides a REST‑style API for developers to integrate chart calculations into their applications. It supports up to 60 compute
  or MCP POST requests per minute per IP and enforces CORS without credentials.
url: https://artifacts.apis.io/astraluno-com/apis.yml
accessModel:
  pricing: unknown
  onboarding: open
  trial: false
  try_now: false
  public: true
  gated: none
  gated_source:
  - onboarding
  label: Open access
  confidence: medium
  probe_state: unreadable
  source:
  - authentication
  - rate-limits
  - security
  generated: '2026-11-02'
  method: derived
image: https://astraluno.com/og/home.png
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-11-01 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-11-01'
modified: '2026-11-01'
tags:
- Astrology
- BirthChart
- FreeTool
- Horoscope
tags_raw:
- Astrology
- BirthChart
- FreeTool
- API
- Horoscope
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/astraluno-com-agentic-access.yml
- type: RateLimits
  url: rate-limits/astraluno-com-rate-limits.yml
- type: Spectral
  url: rules/astraluno-com-rules.yml
- type: AgentSkill
  url: skills/_index.yml
- type: ErrorCatalog
  url: errors/astraluno-com-problem-types.yml
- type: Conformance
  url: conformance/astraluno-com-conformance.yml
- type: LLMsTxt
  url: llms/astraluno-com-llms.txt
- type: ToolCrosswalk
  url: mcp/astraluno-com-tool-crosswalk.yml
- type: MCPServer
  url: mcp/astraluno-com-mcp.yml
- type: Hosts
  url: hosts/astraluno-com-hosts.yml
- type: DomainSecurity
  url: security/astraluno-com-domain-security.yml
- type: Website
  url: https://astraluno.com/
- type: PrivacyPolicy
  url: https://astraluno.com/privacy/
- type: TermsOfService
  url: https://astraluno.com/terms/
- type: PrivacyPolicy
  url: https://astraluno.com/privacy/
- type: TermsOfService
  url: https://astraluno.com/terms/
apis:
- aid: astraluno-com:astraluno-mcp
  name: Astraluno MCP API
  description: Free, read‑only tropical geocentric astrology and Whole Sign birth charts via MCP JSON‑RPC.
  humanURL: https://astraluno.com/developers/
  baseURL: https://astraluno.com/mcp
  tags:
  - Astrology
  - MCP
  properties:
  - type: Documentation
    url: https://astraluno.com/developers/
- aid: astraluno-com:astraluno-com-chart-api
  name: Astraluno Chart API
  description: The Chart API from Astraluno — 1 operation(s) for chart.
  humanURL: https://astraluno.com/developers/
  baseURL: https://astraluno.com
  tags:
  - Chart
  properties:
  - type: OpenAPI
    url: openapi/astraluno-com-chart-api-openapi.yml
- aid: astraluno-com:astraluno-com-ingresses-api
  name: Astraluno Ingresses API
  description: The Ingresses API from Astraluno — 1 operation(s) for ingresses.
  humanURL: https://astraluno.com/developers/
  baseURL: https://astraluno.com
  tags:
  - Ingresses
  properties:
  - type: OpenAPI
    url: openapi/astraluno-com-ingresses-api-openapi.yml
- aid: astraluno-com:astraluno-com-lunations-api
  name: Astraluno Lunations API
  description: The Lunations API from Astraluno — 1 operation(s) for lunations.
  humanURL: https://astraluno.com/developers/
  baseURL: https://astraluno.com
  tags:
  - Lunations
  properties:
  - type: OpenAPI
    url: openapi/astraluno-com-lunations-api-openapi.yml
- aid: astraluno-com:astraluno-com-openapi-json-api
  name: Astraluno Openapi.json API
  description: The Openapi.json API from Astraluno — 1 operation(s) for openapi.json.
  humanURL: https://astraluno.com/developers/
  baseURL: https://astraluno.com
  tags:
  - Openapi.json
  properties:
  - type: OpenAPI
    url: openapi/astraluno-com-openapi-json-api-openapi.yml
- aid: astraluno-com:astraluno-com-places-api
  name: Astraluno Places API
  description: The Places API from Astraluno — 1 operation(s) for places.
  humanURL: https://astraluno.com/developers/
  baseURL: https://astraluno.com
  tags:
  - Places
  properties:
  - type: OpenAPI
    url: openapi/astraluno-com-places-api-openapi.yml
- aid: astraluno-com:astraluno-com-readings-api
  name: Astraluno Readings API
  description: The Readings API from Astraluno — 1 operation(s) for readings.
  humanURL: https://astraluno.com/developers/
  baseURL: https://astraluno.com
  tags:
  - Readings
  properties:
  - type: OpenAPI
    url: openapi/astraluno-com-readings-api-openapi.yml
- aid: astraluno-com:astraluno-com-retrogrades-api
  name: Astraluno Retrogrades API
  description: The Retrogrades API from Astraluno — 1 operation(s) for retrogrades.
  humanURL: https://astraluno.com/developers/
  baseURL: https://astraluno.com
  tags:
  - Retrogrades
  properties:
  - type: OpenAPI
    url: openapi/astraluno-com-retrogrades-api-openapi.yml
- aid: astraluno-com:astraluno-com-sky-api
  name: Astraluno Sky API
  description: The Sky API from Astraluno — 1 operation(s) for sky.
  humanURL: https://astraluno.com/developers/
  baseURL: https://astraluno.com
  tags:
  - Sky
  properties:
  - type: OpenAPI
    url: openapi/astraluno-com-sky-api-openapi.yml
- aid: astraluno-com:astraluno-com-sun-sign-api
  name: Astraluno Sun Sign API
  description: The Sun Sign API from Astraluno — 1 operation(s) for sun sign.
  humanURL: https://astraluno.com/developers/
  baseURL: https://astraluno.com
  tags:
  - Sun Sign
  properties:
  - type: OpenAPI
    url: openapi/astraluno-com-sun-sign-api-openapi.yml
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: The provider’s public developer portal describes an API but no OpenAPI, AsyncAPI, GraphQL, or other machine‑readable
    spec is published.
  evidence:
  - url: https://astraluno.com/api/v1/openapi.json
    status: 200
  checked: '2026-11-02'
x-enrichment:
  date: '2026-11-01'
  status: enriched
  artifacts_added: 38
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

Astraluno API — frequently asked questions

Does Astraluno have an API?

Yes. APIs.io lists 10 APIs from Astraluno, including Astraluno MCP API, Astraluno Chart API and Astraluno Ingresses API, and 7 more.

Is there an OpenAPI specification for the Astraluno API?

Yes. APIs.io indexes 9 OpenAPI specifications for Astraluno, each linked for download from this page.

How do I authenticate with the Astraluno API?

Astraluno documents its authentication (0 schemes). The details are profiled on APIs.io as Astraluno Com Authentication.

Does Astraluno have an MCP server?

Yes. APIs.io lists 1 MCP server for Astraluno: Remote MCP server at astraluno.com.

Is the Astraluno API ready for AI agents?

Astraluno has a Kin Score of 31.6 out of 100 (thin) and an Agent Readiness score of 34.4 (agent-ready), scored by API Evangelist on 2026-11-02.

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