maindex-io

Maindex provides a memory graph platform designed for both AI agents and human teams. It captures, stores, and organizes facts, code snippets, and contextual information in a structured, searchable graph. The service emphasizes provenance, accountability, and collaborative editing, allowing agents to read from and write to shared memory while humans can trust the source and history of each fact. Maindex aims to improve productivity and knowledge sharing across development teams and AI-powered workflows, offering APIs for integration and a web interface for exploration.

maindex-io is listed with 1 API on the APIs.io network. Tagged areas include Company, AI, Memory, Knowledge-Graph, and Collaboration.

maindex-io’s developer surface includes support, documentation, pricing, and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

19.4/100 emerging Agent 7/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

1 API 1 MCP Servers

CompanyAIMemoryKnowledge-GraphCollaboration Productivity

Kin Score

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

Composite quality — 19.4/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 2.4 / 17

Access Clarity 8.9 / 17

Operational Transparency 0.0 / 11

Contract Governance 0.0 / 10

Discoverability 4.8 / 9

Regulatory Posture 2.6 / 15

Agent readiness — 7/100 · 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 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 5 / 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/.

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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):

Contract Quality scores 0.0 — up to +25.0 composite points
Developer Ergonomics scores 14.3 — up to +17.1 composite points
Operational Transparency scores 0.0 — up to +13.0 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/maindex-io/apis.yml: open an issue on github.com/api-evangelist/maindex-io 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.

LLM Memory API

A simple API for adding long-term memory to your LLM stack. Structured storage, semantic recall, and persistent context, not another vector database.

MCP Servers 1

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

maindex-io MCP Server

Remote MCP server at maindex.io.

MCP SERVER

Security Posture 1

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

Maindex Io Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

MCPServer

MCPServer

WellKnown

WellKnown

Access & Security 2

Authentication, authorization, and security posture

TrustCenter

TrustCenter

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Pricing

Pricing

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: maindex-io
name: maindex-io
description: Maindex provides a memory graph platform designed for both AI agents and human teams. It captures, stores, and
  organizes facts, code snippets, and contextual information in a structured, searchable graph. The service emphasizes provenance,
  accountability, and collaborative editing, allowing agents to read from and write to shared memory while humans can trust
  the source and history of each fact. Maindex aims to improve productivity and knowledge sharing across development teams
  and AI-powered workflows, offering APIs for integration and a web interface for exploration.
url: https://artifacts.apis.io/maindex-io/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-30 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-30'
modified: '2026-10-30'
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: Docs at https://maindex.io/docs/ return a Swagger UI page but no OpenAPI/AsyncAPI/GraphQL spec is publicly accessible.
  evidence:
  - url: https://maindex.io/openapi.json
    status: 404
  - url: https://maindex.io/v1/openapi.json
    status: 401
  checked: '2026-10-30'
tags:
- Company
- AI
- Memory
- Knowledge-Graph
- Collaboration
- Productivity
image: https://maindex.io/assets/images/logo-favicon.svg
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: LLMsTxt
  url: llms/maindex-io-llms.txt
- type: MCPServer
  url: mcp/maindex-io-mcp.yml
- type: WellKnown
  url: well-known/maindex-io-well-known.yml
- type: Hosts
  url: hosts/maindex-io-hosts.yml
- type: TrustCenter
  url: https://maindex.io/trust/
- type: TermsOfService
  url: https://maindex.io/legal/terms/
- type: Support
  url: https://maindex.io/help/
- type: PrivacyPolicy
  url: https://maindex.io/legal/privacy/
- type: Login
  url: https://maindex.io/auth/login
- type: DomainSecurity
  url: security/maindex-io-domain-security.yml
- type: Website
  url: https://maindex.io/
- type: Documentation
  url: https://maindex.io/docs/
- type: Pricing
  url: https://maindex.io/pricing/
apis:
- name: LLM Memory API
  description: A simple API for adding long-term memory to your LLM stack. Structured storage, semantic recall, and persistent
    context, not another vector database.
  humanURL: https://maindex.io/llm-memory-api/
  aid: maindex-io:llm-memory-api
x-enrichment:
  date: '2026-10-30'
  status: enriched
  artifacts_added: 11
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

maindex-io API — frequently asked questions

Does maindex-io have an API?

Yes. APIs.io lists 1 API from maindex-io, including LLM Memory API.

Does maindex-io have an MCP server?

Yes. APIs.io lists 1 MCP server for maindex-io: Remote MCP server at maindex.io.

Is the maindex-io API ready for AI agents?

maindex-io has a Kin Score of 19.4 out of 100 (emerging) and an Agent Readiness score of 7.1 (agent-aware), scored by API Evangelist on 2026-10-31.

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