fatheron-dev
Fat Heron provides a platform for developers to ship mail, DNS, identity, billing, and lander services at breakneck speed. It offers compute, storage, and voice capabilities on the roadmap, with agency whitelabel coming later. Built for solo projects, consultancies, and freelancers using LLMs and agents, it emphasizes security and scale by default.
Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.
API Evangelist profiles fatheron-dev the way a machine reads it — 34 machine-readable artifacts across 1 API, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — fatheron-dev scores 47.5/100 (developing), with a separate agent-readiness read of 45/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Why this profile is thin
the company serves an API surface but requires credentials before any description of it can be read
An API exists — we simply could not reach the contract without credentials or a sales conversation. This one is fatheron-dev's to change: publishing the reference and a machine-readable spec at a public URL, while keeping key issuance behind whatever gate they like, would let an integrator evaluate the API before committing to a call.
What we probed
https://api.fatheron.dev/openapi.json→ HTTPhttps://api.fatheron.dev/mcp→ HTTP 401https://fatheron.dev/→ HTTP 200
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Kin Score
How this is scored →scored 2026-10-31 · rubric v0.25.0
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</a>More shapes, themes and sizes → · Score as JSON · How badges work
How we profile fatheron-dev
Each block below is one kind of artifact we hold for fatheron-dev. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 20
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
Individual APIs this provider publishes, each with its own machine-readable definition.
fatheron-dev Builders API
The builders API from fatheron-dev — 3 operation(s) for builders.
fatheron-dev Catalog API
The catalog API from fatheron-dev — 7 operation(s) for catalog.
fatheron-dev Domainers API
The domainers API from fatheron-dev — 87 operation(s) for domainers.
fatheron-dev Domainers Public API
The domainers-public API from fatheron-dev — 4 operation(s) for domainers-public.
fatheron-dev Email Tracking API
The email-tracking API from fatheron-dev — 2 operation(s) for email-tracking.
fatheron-dev Health API
The health API from fatheron-dev — 3 operation(s) for health.
fatheron-dev Leads API
The leads API from fatheron-dev — 2 operation(s) for leads.
fatheron-dev Mail Sync API
The mail-sync API from fatheron-dev — 13 operation(s) for mail-sync.
fatheron-dev Merch API
The merch API from fatheron-dev — 5 operation(s) for merch.
fatheron-dev Pgp API
The pgp API from fatheron-dev — 5 operation(s) for pgp.
fatheron-dev Public API
The public API from fatheron-dev — 149 operation(s) for public.
fatheron-dev Public Crawl API
The public-crawl API from fatheron-dev — 2 operation(s) for public-crawl.
fatheron-dev Public Gifts API
The public-gifts API from fatheron-dev — 5 operation(s) for public-gifts.
fatheron-dev Public Landers API
The public-landers API from fatheron-dev — 3 operation(s) for public-landers.
fatheron-dev Public Mailbox Setup API
The public-mailbox-setup API from fatheron-dev — 5 operation(s) for public-mailbox-setup.
fatheron-dev Public Publisher API
The public-publisher API from fatheron-dev — 1 operation(s) for public-publisher.
fatheron-dev Push API
The push API from fatheron-dev — 3 operation(s) for push.
fatheron-dev Research API
The research API from fatheron-dev — 1 operation(s) for research.
fatheron-dev Sandbox API
The sandbox API from fatheron-dev — 4 operation(s) for sandbox.
fatheron-dev Webhooks API
The webhooks API from fatheron-dev — 3 operation(s) for webhooks.
Scroll within the panel for all 20 ·
Agent Skills 1
An agent skill packages the how-to for driving these APIs from an assistant — the prompts, the sequence, the guardrails — so the knowledge to use the API travels with it.
Packaged agent skills for driving this provider's APIs from an AI assistant.
http
AGENT SKILLRate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Fatheron Dev Rate Limits
RATE LIMITSSemantic Vocabularies 1
JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.
JSON-LD contexts and semantic vocabularies used across these APIs.
Fatheron Dev Context
JSON-LDSpectral Rules 1
Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.
fatheron-dev API Rules
SPECTRALJSON Schema 6
Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.
Standalone JSON Schema definitions for this provider's data models.
MerchCheckoutRequest
JSON SCHEMAPurchaseGiftRequest
JSON SCHEMAPutPgpPrivateKeyBackupRequest
JSON SCHEMARegisterAcquireRequest
JSON SCHEMAUpdateMailboxRequest
JSON SCHEMAUpsertBrokerBrandRequest
JSON SCHEMASecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Scopes 1
OAuth scopes are the vocabulary of least-privilege access. Profiling them shows exactly what an integration — or an agent acting on a user's behalf — is allowed to do.
OAuth scopes governing access to this provider's APIs.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for fatheron-dev — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Get Started 2
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 4
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 8
Pagination, idempotency, versioning, errors, and events
Scroll within the panel for all 8 ·
Access & Security 1
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 1
The organization behind the API
Other 2
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/fatheron-dev · machine-readable index on apis.io
This is an independent, third-party profile of fatheron-dev, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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you will get a person, not a form — we will tell you exactly which public URLs this profile was built from.