Castos

Castos provides podcast hosting and publishing services, offering tools for creators to launch, grow, and monetize their shows. Their platform includes podcast hosting, hybrid and private podcasting solutions, YouTube republishing, analytics, customizable websites, transcription, AI assistance, and mobile apps. Castos serves businesses, agencies, churches, universities, and nonprofits, with features like commerce, advertising, and enterprise solutions.

Castos is listed with 1 API on the APIs.io network. Tagged areas include Podcast, Hosting, Media, Analytics, and Enterprise.

Castos’ developer surface includes documentation, API reference, engineering blog, pricing, support, getting-started guide, and 13 more developer resources.

🌐 Visit website📡 Profile data on GitHub
33.3/100 thin Agent 6/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →
1 API
PodcastHostingMediaAnalyticsEnterprise

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0
Composite quality — 33.3/100 · thin
Contract Quality 0.0 / 21
Developer Ergonomics 6.1 / 17
Access Clarity 14.3 / 17
Operational Transparency 1.7 / 11
Contract Governance 0.0 / 10
Discoverability 5.8 / 9
Regulatory Posture 2.8 / 15
Agent readiness — 6/100 · agent aware
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 12 / 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 4 / 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
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/.
Show this score on your site. Kin Score badge preview for Castos It updates itself when the score changes. Paste this where you link to your API docs: 
<a href="https://apis.io/providers/castos/"><img src="https://apis.io/badge/castos/card.svg" alt="Castos on APIs.io — Kin Score by API Evangelist"></a>
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Agent readiness — checks not met, largest first (exact, from this profile):
  • Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
  • Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
  • 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
  • Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
11 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.
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/castos/apis.yml: open an issue on github.com/api-evangelist/castos 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.

Castos API

The Castos API allows managing podcasts, episodes, and private subscribers.

Pricing Plans 1

Published pricing tiers and plan structures.

Castos Plans Pricing

4 plans

PLANS

Security Posture 1

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

Castos Domain Security

TLSv1.3 · DMARC

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login
Login
 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

Access & Security 2

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 DomainSecurity
DomainSecurity

Operate 2

Status, limits, changes, and where to get help

StatusPage
StatusPage
 Support
Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans
Plans
 TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy
 Pricing
Pricing

Company 3

The organization behind the API

Newsroom
Newsroom
 Website
Website
 Blog
Blog

Other 2

Properties that don't map to a standard resource type

Hosts
Hosts
 Vendors
Vendors

Source (apis.yml)

apis.yml Raw ↑ 
aid: castos
name: Castos
image: https://images-cdn.castos.com/2026/10/castos-default-og.webp
description: Castos provides podcast hosting and publishing services, offering tools for creators to launch, grow, and monetize
  their shows. Their platform includes podcast hosting, hybrid and private podcasting solutions, YouTube republishing, analytics,
  customizable websites, transcription, AI assistance, and mobile apps. Castos serves businesses, agencies, churches, universities,
  and nonprofits, with features like commerce, advertising, and enterprise solutions.
url: https://artifacts.apis.io/castos/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-28 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-28'
modified: '2026-10-28'
tags:
- Podcast
- Hosting
- Media
- Analytics
- Enterprise
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/castos-plans-pricing.yml
- type: LLMsTxt
  url: llms/castos-llms.txt
- type: WellKnown
  url: well-known/castos-well-known.yml
- type: Hosts
  url: hosts/castos-hosts.yml
- type: Vendors
  url: vendors/castos-vendors.yml
- type: TrustCenter
  url: https://trust.castos.com/
- type: TermsOfService
  url: https://www.castos.com/terms
- type: StatusPage
  url: https://status.castos.com/
- type: PrivacyPolicy
  url: https://castos.com/privacy/
- type: Newsroom
  url: https://castos.com/press/
- type: Login
  url: https://app.castos.com/login
- type: DomainSecurity
  url: security/castos-domain-security.yml
- type: Website
  url: https://castos.com/
- type: Documentation
  url: https://app.castos.com/docs/api/index.html
- type: APIReference
  url: https://app.castos.com/docs/api/swagger.yaml
- type: Blog
  url: https://castos.com/blog/
- type: Pricing
  url: https://castos.com/pricing/
- type: Support
  url: https://castos.com/support/
- type: GettingStarted
  url: https://castos.com/how-to-start-a-podcast/
apis:
- name: Castos API
  description: The Castos API allows managing podcasts, episodes, and private subscribers.
  humanURL: https://app.castos.com/docs/api/index.html
  baseURL: https://app.castos.com/api/v2
  aid: castos:castos-api
x-submission-probe: 200, 2026-10-26
x-enrichment:
  date: '2026-10-28'
  status: enriched
  artifacts_added: 12
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Castos API — frequently asked questions

Does Castos have an API?

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

How much does the Castos API cost?

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

Is the Castos API ready for AI agents?

Castos has a Kin Score of 33.3 out of 100 (thin) and an Agent Readiness score of 6.0 (agent-aware), scored by API Evangelist on 2026-10-31.

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  • get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
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