Neuronto ARD Registry

Agentic Resource Discovery (ARD) index. One search covers this index and every other public ARD registry, and results carry the tools each MCP server actually exposes, read from its own tools/list. The index holds 15,412 resources from 6,926 publishers, 14,522 verified to respond, and answers over REST, MCP and A2A with no key and no signup.

Neuronto ARD Registry publishes 1 API on the APIs.io network. Tagged areas include Agentic Resource Discovery, ARD, MCP, A2A, and API Discovery.

Neuronto ARD Registry’s developer surface includes CLI, authentication, pricing, engineering blog, getting-started guide, and 16 more developer resources.

🌐 Visit website 📡 Source on GitHub
43.7/100 developing Agent 34/100 agent ready Full breakdown ↓
scored 2026-09-07 · rubric v0.20.0
1 APIs 1 MCP Servers
Agentic Resource DiscoveryARDMCPA2AAPI DiscoveryRegistry

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-07 · rubric v0.20.0
Composite quality — 43.7/100 · developing
Contract Quality 8.9 / 23
Developer Ergonomics 9.3 / 18
Access Clarity 9.5 / 18
Operational Transparency 4.0 / 12
Contract Governance 2.0 / 11
Discoverability 6.3 / 9
Create-or-Update Ergonomics 0.0 / 10
Agent readiness — 34/100 · agent ready
Machine-Readable Contract 18 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
MCP Server 12 / 12
Machine-Readable Auth 10 / 10
Idempotency 9 / 9
Stable Error Semantics 8 / 8
Request/Response Examples 7 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 5 / 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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.
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/neuronto: 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.

Neuronto ARD Registry API

Search, explore and audit Agentic Resource Discovery entries: MCP servers, A2A agents, OpenAPI services and documentation. REST, MCP and A2A answer from one index. No key, no si...

MCP Servers 1

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

Neuronto ARD Registry MCP Server

Official hosted MCP server for the Neuronto ARD Registry. tools/list answered a live anonymous POST on 2026-09-07 (HTTP 200, application/json) with 4 tools; the response is save...

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Neuronto Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Neuronto Rate Limits

5 limits

RATE LIMITS

Security Posture 2

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

Neuronto Authentication

2 schemes

SECURITY

Neuronto Domain Security

TLSv1.3 · HSTS

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted
GettingStarted

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

WellKnown
WellKnown
 LLMsTxt
LLMsTxt
 AgentSkill
AgentSkill

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conformance
Conformance
 Conventions
Conventions
 Idempotency
Idempotency
 Lifecycle
Lifecycle

Build 4

SDKs, sample code, and the tooling you integrate with

Packages
Packages
 SDKs
SDKs
 CLI
CLI
 GitHubOrganization
GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Operate 1

Status, limits, changes, and where to get help

RateLimits
RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Plans
Plans
 Pricing
Pricing
 PrivacyPolicy
PrivacyPolicy

Company 3

The organization behind the API

Website
Website
 Blog
Blog
 BlogRSS
BlogRSS

Source (apis.yml)

apis.yml Raw ↑ 
name: Neuronto ARD Registry
description: Agentic Resource Discovery (ARD) index. One search covers this index and every other public ARD registry, and
  results carry the tools each MCP server actually exposes, read from its own tools/list. The index holds 15,412 resources
  from 6,926 publishers, 14,522 verified to respond, and answers over REST, MCP and A2A with no key and no signup.
image: https://neuronto.com/icon.svg
url: https://raw.githubusercontent.com/api-evangelist/neuronto/refs/heads/main/apis.yml
created: '2026-08-31'
modified: '2026-09-07'
specificationVersion: '0.23'
tags:
- Agentic Resource Discovery
- ARD
- MCP
- A2A
- API Discovery
- Registry
apis:
- aid: neuronto:ard-registry
  name: Neuronto ARD Registry API
  description: 'Search, explore and audit Agentic Resource Discovery entries: MCP servers, A2A agents, OpenAPI services and
    documentation. REST, MCP and A2A answer from one index. No key, no signup.'
  image: https://neuronto.com/icon.svg
  humanURL: https://neuronto.com
  baseURL: https://neuronto.com
  tags:
  - Agentic Resource Discovery
  - ARD
  - MCP
  - A2A
  - API Discovery
  - Registry
  properties:
  - type: OpenAPI
    url: openapi/neuronto-openapi.json
  - type: Documentation
    url: https://neuronto.com/api-docs
  - type: MCPServer
    url: mcp/neuronto-mcp.yml
  - type: MCPServerCard
    url: https://neuronto.com/.well-known/mcp/server-card.json
  - type: ToolCrosswalk
    url: mcp/neuronto-tool-crosswalk.yml
  - type: AgentCard
    url: a2a/neuronto-a2a.yml
  - type: Website
    url: https://neuronto.com
  - type: GitHubRepository
    url: https://github.com/neuronto/agentic-resource-discovery
  - type: License
    url: https://www.apache.org/licenses/LICENSE-2.0
  - type: Overlay
    url: overlays/neuronto-ard-registry-overlay.yaml
  - type: ErrorCatalog
    url: errors/neuronto-problem-types.yml
maintainers:
- FN: Neuronto
  url: https://neuronto.com
x-source:
  via: api-search/inbox#24; built from the provider-served apis.json (200) -- one of three ever to resolve
  fetched: '2026-09-07'
  note: Only the self url re-pointed; descriptor is theirs.
common:
- type: DomainSecurity
  url: security/neuronto-domain-security.yml
- type: Packages
  url: packages/neuronto-packages.yml
- type: SDKs
  url: packages/neuronto-packages.yml
- type: CLI
  url: cli/neuronto-cli.yml
- type: WellKnown
  url: well-known/neuronto-well-known.yml
- type: LLMsTxt
  url: llms/neuronto-llms.txt
- type: Website
  url: https://neuronto.com
- type: Conformance
  url: conformance/neuronto-conformance.yml
- type: Authentication
  url: authentication/neuronto-authentication.yml
- type: Conventions
  url: conventions/neuronto-conventions.yml
- type: Idempotency
  url: conventions/neuronto-conventions.yml
- type: Lifecycle
  url: lifecycle/neuronto-lifecycle.yml
- type: Plans
  url: plans/neuronto-plans-pricing.yml
- type: Pricing
  url: https://neuronto.com/pricing
- type: RateLimits
  url: rate-limits/neuronto-rate-limits.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Blog
  url: https://neuronto.com/blog
- type: BlogRSS
  url: https://neuronto.com/feed.xml
- type: PrivacyPolicy
  url: https://neuronto.com/privacy
- type: GettingStarted
  url: https://neuronto.com/publish
- type: GitHubOrganization
  url: https://github.com/neuronto
x-enrichment:
  date: '2026-09-07'
  status: enriched
  artifacts_added: 26
  pass: local-v3

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