Merkle Manufactory Inc.

Merkle Manufactory Inc. is the company that builds Farcaster, a sufficiently decentralized social network, and Snapchain, the blockchain-like peer-to-peer network that stores and syncs Farcaster's social data. Its developer surface is open and protocol-based rather than a single hosted product API: Snapchain nodes serve an HTTP API (port 3381, /v1) and a gRPC API (port 3383) for reading casts, reactions, links, user data, verifications and on-chain events and for submitting signed messages; Mini Apps (formerly Frames v2) run inside the Farcaster feed; and Sign In with Farcaster (SIWF) plus AuthKit provide identity for third-party apps. The stack is fully open source under the farcasterxyz GitHub organization. Backed by a16z.

Merkle Manufactory Inc. publishes 1 API on the APIs.io network. Tagged areas include Company, Social, Decentralized Social, Protocol, and Blockchain.

Merkle Manufactory Inc.’s developer surface includes documentation, API reference, getting-started guide, signup flow, support, authentication, and 8 more developer resources.

🌐 Visit website 📡 Source on GitHub

28.2/100 thin ▬ flat Agent 19/100 agent aware saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

Company Social Decentralized Social Protocol Blockchain Web3 Developer Platform Farcaster

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 28.2/100 · thin

Contract Quality 6.7 / 25

Developer Ergonomics 11.0 / 20

Access Clarity 2.6 / 20

Operational Transparency 0.3 / 13

Contract Governance 0.0 / 12

Discoverability 7.6 / 10

Agent readiness — 19/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 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 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

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.

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 github.com/api-evangelist/merkle-manufactory-inc: open an issue to ask a question, or submit a pull request to add artifacts. 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.

Snapchain HTTP API

The read/write REST interface a Snapchain node serves on port 3381 under the /v1 path. Read endpoints (casts, reactions, links, user data, verifications, fids, username proofs, ...

Security Posture 2

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

Merkle Manufactory Inc Authentication

none/signed-message · 2 schemes

SECURITY

Merkle Manufactory Inc Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

Conventions

Conventions

Idempotency

Idempotency

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 1

Status, limits, changes, and where to get help

Support

Support

Company 1

The organization behind the API

Website

Website

Other 1

Properties that don't map to a standard resource type

Protobuf

Protobuf

Source (apis.yml)

aid: merkle-manufactory-inc
name: Merkle Manufactory Inc.
description: 'Merkle Manufactory Inc. is the company that builds Farcaster, a sufficiently decentralized social network, and
  Snapchain, the blockchain-like peer-to-peer network that stores and syncs Farcaster''s social data. Its developer surface
  is open and protocol-based rather than a single hosted product API: Snapchain nodes serve an HTTP API (port 3381, /v1) and
  a gRPC API (port 3383) for reading casts, reactions, links, user data, verifications and on-chain events and for submitting
  signed messages; Mini Apps (formerly Frames v2) run inside the Farcaster feed; and Sign In with Farcaster (SIWF) plus AuthKit
  provide identity for third-party apps. The stack is fully open source under the farcasterxyz GitHub organization. Backed
  by a16z.'
url: https://raw.githubusercontent.com/api-evangelist/merkle-manufactory-inc/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://docs.farcaster.xyz/og-image.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
x-tier: profiled
x-tier-reason: enriched
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Social
- Decentralized Social
- Protocol
- Blockchain
- Web3
- Developer Platform
- Farcaster
apis:
- name: Snapchain HTTP API
  description: The read/write REST interface a Snapchain node serves on port 3381 under the /v1 path. Read endpoints (casts,
    reactions, links, user data, verifications, fids, username proofs, storage limits, on-chain events, info, events) are
    unauthenticated; writes are performed by submitting protobuf-encoded, Ed25519-signed Farcaster messages to /v1/submitMessage.
    Snapchain is self-hosted node software (a drop-in replacement for Hubble); the default documented base address is a local
    node.
  humanURL: https://snapchain.farcaster.xyz/reference/httpapi/httpapi
  baseURL: http://127.0.0.1:3381/v1
  tags:
  - Social
  - Decentralized Social
  - Protocol
  properties:
  - type: Documentation
    url: https://snapchain.farcaster.xyz/
  - type: APIReference
    url: https://snapchain.farcaster.xyz/reference/httpapi/httpapi
  - type: GettingStarted
    url: https://snapchain.farcaster.xyz/getting-started
  - type: Protobuf
    url: grpc/merkle-manufactory-inc-rpc.proto
    name: Snapchain gRPC API (rpc.proto)
  - type: Protobuf
    url: grpc/merkle-manufactory-inc-message.proto
    name: Farcaster Message model (message.proto)
common:
- type: Website
  url: https://www.farcaster.xyz/
- type: DomainSecurity
  url: security/merkle-manufactory-inc-domain-security.yml
- type: DeveloperPortal
  url: https://docs.farcaster.xyz/
- type: Documentation
  url: https://docs.farcaster.xyz/
- type: APIReference
  url: https://snapchain.farcaster.xyz/reference/httpapi/httpapi
- type: GettingStarted
  url: https://snapchain.farcaster.xyz/getting-started
- type: GitHubOrganization
  url: https://github.com/farcasterxyz
- type: SignUp
  url: https://farcaster.xyz/
- type: Support
  url: https://farcaster.xyz/~/channel/fc-devs
- type: Authentication
  url: authentication/merkle-manufactory-inc-authentication.yml
- type: Conventions
  url: conventions/merkle-manufactory-inc-conventions.yml
- type: Idempotency
  url: conventions/merkle-manufactory-inc-conventions.yml
- type: Protobuf
  url: grpc/merkle-manufactory-inc-rpc.proto
  name: Snapchain gRPC API definitions
- type: LLMsTxt
  url: llms/merkle-manufactory-inc-llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 12
  pass: local-v1

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