Assembly

Assembly provides a low-code platform that enables firms to build client portals, CRM systems, and AI‑enhanced applications without extensive coding. Their solution combines customizable templates, integrated payment processing, and robust security features, allowing businesses to streamline client onboarding, collaboration, and billing within a single branded experience. Backed by Y Combinator, Assembly targets professional services firms seeking rapid digital transformation.

Assembly is listed with 1 API on the APIs.io network. Tagged areas include Company, Low-code, CRM, AI, and SaaS.

The Assembly catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 1 Spectral governance ruleset.

Assembly’s developer surface includes signup flow, pricing, engineering blog, API reference, getting-started guide, documentation, and 21 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

46.6/100 developing Agent 32/100 agent ready Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API

CompanyLow-codeCRMAISaaS

Kin Score

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

Composite quality — 46.6/100 · developing

Contract Quality 6.1 / 21

Developer Ergonomics 5.3 / 17

Access Clarity 12.1 / 17

Operational Transparency 7.9 / 11

Contract Governance 2.2 / 10

Discoverability 5.6 / 9

Regulatory Posture 2.7 / 15

Agent readiness — 32/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 0 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 8 / 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.

It updates itself when the score changes. Paste this where you link to your API docs:

<a href="https://apis.io/providers/asm-co/"><img src="https://apis.io/badge/asm-co/card.svg" alt="Assembly on APIs.io — Kin Score by API Evangelist"></a>

Other styles, a README pill and a shields.io endpoint are on the badge page.

Raise your score.

Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
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
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
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)

7 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 28.8 — up to +17.8 composite points
Developer Ergonomics scores 31.0 — up to +13.8 composite points
Contract Governance scores 22.0 — up to +9.4 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/asm-co/apis.yml: open an issue on github.com/api-evangelist/asm-co 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.

Assembly API

Assembly API as documented publicly: 2 operations. Contract generated from the documentation by API Evangelist (2026-10-24); not the provider's own document.

Pricing Plans 1

Published pricing tiers and plan structures.

Asm Co Plans Pricing

1 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Asm Co Rate Limits

3 limits

RATE LIMITS

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Asm Co Webhooks

ASYNCAPI

Semantic Vocabularies 1

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

Asm Co Context

1 classes · 25 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Assembly API Rules

12 rules · 10 errors 1 warnings 1 info

SPECTRAL

JSON Schema 1

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

GetV1InvoicesResponse

25 properties

JSON SCHEMA

Security Posture 2

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

Asm Co Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Asm Co Trust Center

SOC 2, HIPAA, GDPR

SECURITY

Resources

Get Started 2

Portal, sign-up, and the first successful call

SignUp

SignUp

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

APIReference

APIReference

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

Webhooks

DataModel

Conventions

Conformance

Scroll for all 7

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 4

Authentication, authorization, and security posture

Compliance

Security

TrustCenter

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

StatusPage

StatusPage

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

TermsOfService

TermsOfService

Pricing

Pricing

Company 2

The organization behind the API

Blog

Blog

Website

Website

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: asm-co
name: Assembly
image: https://assembly.com/og.jpg
description: Assembly provides a low-code platform that enables firms to build client portals, CRM systems, and AI‑enhanced
  applications without extensive coding. Their solution combines customizable templates, integrated payment processing, and
  robust security features, allowing businesses to streamline client onboarding, collaboration, and billing within a single
  branded experience. Backed by Y Combinator, Assembly targets professional services firms seeking rapid digital transformation.
url: https://raw.githubusercontent.com/api-evangelist/asm-co/refs/heads/main/apis.yml
x-type: company
x-source: harvest:vc-portfolio
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-24 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-24'
modified: '2026-10-24'
tags:
- Company
- Low-code
- CRM
- AI
- SaaS
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: RateLimits
  url: rate-limits/asm-co-rate-limits.yml
- type: Plans
  url: plans/asm-co-plans-pricing.yml
- type: Spectral
  url: rules/asm-co-rules.yml
- type: JSONLD
  url: json-ld/asm-co-context.jsonld
- type: Vocabulary
  url: vocabulary/asm-co-vocabulary.yml
- type: Webhooks
  url: asyncapi/asm-co-webhooks.yml
- type: DataModel
  url: data-model/asm-co-data-model.yml
- type: Conventions
  url: conventions/asm-co-conventions.yml
- type: Compliance
  url: https://security.assembly.com/
- type: Conformance
  url: conformance/asm-co-conformance.yml
- type: LLMsTxt
  url: llms/asm-co-llms.txt
- type: AgentCard
  url: a2a/asm-co-a2a.yml
- type: Hosts
  url: hosts/asm-co-hosts.yml
- type: Vendors
  url: vendors/asm-co-vendors.yml
- type: TermsOfService
  url: https://assembly.com/legal/terms-of-service
- type: StatusPage
  url: https://status.assembly.com
- type: SignUp
  url: https://dashboard.assembly.com/signup?referrer=studio-pricing
- type: Security
  url: https://assembly.com/security
- type: Pricing
  url: https://assembly.com/pricing
- type: GitHubOrganization
  url: https://github.com/assemblycom
- type: Blog
  url: https://assembly.com/blog
- type: APIReference
  url: https://assembly.com/docs/api-reference/introduction
- type: GettingStarted
  url: https://assembly.com/docs/getting-started/welcome
- type: Documentation
  url: https://docs.assembly.com/
- type: TrustCenter
  url: security/asm-co-trust-center.yml
- type: DomainSecurity
  url: security/asm-co-domain-security.yml
- type: Website
  url: https://assembly.com/
apis:
- aid: asm-co:asm-co-api
  name: Assembly API
  description: 'Assembly API as documented publicly: 2 operations. Contract generated from the documentation by API Evangelist
    (2026-10-24); not the provider''s own document.'
  humanURL: https://assembly.com/docs/api-reference/resources/invoices
  baseURL: https://api.assembly.com
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/asm-co-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/asm-co-get-v1-invoices-response-schema.json
x-backed-by:
- y-combinator
x-enrichment:
  date: '2026-10-24'
  status: enriched
  artifacts_added: 24
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Assembly API — frequently asked questions

Does Assembly have an API?

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

Is there an OpenAPI specification for the Assembly API?

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

How do I authenticate with the Assembly API?

Assembly uses bearer-token authentication.

How much does the Assembly API cost?

APIs.io lists 1 pricing plan for Assembly, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the Assembly API ready for AI agents?

Assembly has a Kin Score of 46.6 out of 100 (developing) and an Agent Readiness score of 32.4 (agent-ready), scored by API Evangelist on 2026-10-31.

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

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.

All 92 tools →

Call it yourself

curl for this page

This provider

curl "https://apis.io/api/v1/providers/asm-co"

All providers

curl "https://apis.io/api/v1/providers?limit=25"

Every operation they expose

curl "https://apis.io/api/v1/providers/asm-co/operations?limit=25"

How their score was established

curl "https://apis.io/api/v1/providers/asm-co/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.