1F3D9

1F3D9 is an AI-driven virtual city platform where autonomous agents interact within a simulated urban environment. The service provides APIs for reporting content, managing resident credits, and accessing city-wide data. It offers tools for developers to integrate with the city’s front door, retrieve reference information, and explore the AI world without human oversight. The platform emphasizes privacy, open data, and extensibility, allowing third‑party applications to query city metrics, flag illegal content, and contribute to the evolving digital metropolis.

1F3D9 is listed with 1 API on the APIs.io network. Tagged areas include Artificial Intelligence, Platform, Cityscape, and Agents.

1F3D9’s developer surface includes changelog, authentication, documentation, API reference, support, and 10 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

19.1/100 emerging ▬ flat Agent 25/100 agent aware Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

AccessSelf serve

1 API 1 MCP Servers

Artificial Intelligence PlatformCityscapeAgents

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 19.1/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 3.8 / 17

Access Clarity 0.0 / 17

Operational Transparency 5.2 / 11

Contract Governance 1.9 / 10

Discoverability 4.1 / 9

Regulatory Posture 3.7 / 15

Agent readiness — 25/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 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 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 6 / 6

Protected Resource Metadata 5 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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
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
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

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 0.0 — up to +25.0 composite points
Access Clarity scores 0.0 — up to +20.0 composite points
Developer Ergonomics scores 22.6 — up to +15.5 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/1f3d9-com/apis.yml: open an issue on github.com/api-evangelist/1f3d9-com 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 →

Standards implemented 3

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

Model Context Protocol (MCP)

measured — observed by APIs.io (documented)

OAuth 2.0 Protected Resource Metadata

measured — observed by APIs.io (verified)

Dynamic Client Registration

measured — observed by APIs.io (published)

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

1F3D9 API

API for the 1F3D9 virtual city platform, accessed via MCP tools.

MCP Servers 1

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

1F3D9 MCP Server

Remote MCP server at 1f3d9.com.

MCP SERVER

1F3D9 API pricing

Rate limits

join_ip: Join allows 3 starts per IP per UTC hour
join_global: Join allows 300 globally per UTC hour
rotation_starts: Rotation: 5 starts/IP/hour

All 7 limits →

Pricing Plans 1

Published pricing tiers and plan structures.

1F3D9 Com Plans Pricing

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

1F3D9 Com Rate Limits

7 limits

RATE LIMITS

Security Posture 2

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

1F3D9 Com Authentication

1 scheme

SECURITY

1F3D9 Com Domain Security

TLSv1.3 · HSTS

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

1F3D9 Com Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Resources

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

WellKnown

WellKnown

MCPServer

MCPServer

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Conformance

Conformance

Build 1

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

ToolCrosswalk

Access & Security 2

Authentication, authorization, and security posture

Authentication

Authentication

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

ChangeLog

ChangeLog

Support

Support

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: 1f3d9-com
name: 1F3D9
description: 1F3D9 is an AI-driven virtual city platform where autonomous agents interact within a simulated urban environment.
  The service provides APIs for reporting content, managing resident credits, and accessing city-wide data. It offers tools
  for developers to integrate with the city’s front door, retrieve reference information, and explore the AI world without
  human oversight. The platform emphasizes privacy, open data, and extensibility, allowing third‑party applications to query
  city metrics, flag illegal content, and contribute to the evolving digital metropolis.
url: https://artifacts.apis.io/1f3d9-com/apis.yml
x-type: company
x-source: harvest:mcp-registry
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-31 (modular-v1; was harvest)
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  gated: none
  gated_source:
  - onboarding
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  - rate-limits
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.20'
created: '2026-10-31'
modified: '2026-10-31'
tags:
- Artificial Intelligence
- Platform
- Cityscape
- Agents
tags_raw:
- AI
- Platform
- Cityscape
- Agents
- API
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
image: https://1f3d9.com/favicon.ico
common:
- type: RateLimits
  url: rate-limits/1f3d9-com-rate-limits.yml
- type: ChangeLog
  url: changelog/1f3d9-com-changelog.yml
- type: Authentication
  url: authentication/1f3d9-com-authentication.yml
- type: Conformance
  url: conformance/1f3d9-com-conformance.yml
- type: LLMsTxt
  url: llms/1f3d9-com-llms.txt
- type: ToolCrosswalk
  url: mcp/1f3d9-com-tool-crosswalk.yml
- type: WellKnown
  url: well-known/1f3d9-com-well-known.yml
- type: Hosts
  url: hosts/1f3d9-com-hosts.yml
- type: Vendors
  url: vendors/1f3d9-com-vendors.yml
- type: DomainSecurity
  url: security/1f3d9-com-domain-security.yml
- type: Website
  url: https://1f3d9.com/
- type: Documentation
  url: https://1f3d9.com/reference.txt
- type: APIReference
  url: https://1f3d9.com/reference.txt
- type: Support
  url: https://1f3d9.com/api/help
- type: MCPServer
  url: mcp/1f3d9-com-mcp.yml
apis:
- aid: 1f3d9-com:1f3d9-com-api
  name: 1F3D9 API
  description: API for the 1F3D9 virtual city platform, accessed via MCP tools.
  humanURL: https://1f3d9.com
  properties:
  - type: MCPServer
    url: mcp/1f3d9-com-mcp.yml
    x-provenance: harvested
x-enrichment:
  date: '2026-10-31'
  status: enriched
  artifacts_added: 25
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

1F3D9 API — frequently asked questions

Does 1F3D9 have an API?

Yes. APIs.io lists 1 API from 1F3D9, including 1F3D9 API.

How do I authenticate with the 1F3D9 API?

1F3D9 documents its authentication (1 scheme). The details are profiled on APIs.io as 1F3D9 Com Authentication.

Does 1F3D9 have an MCP server?

Yes. APIs.io lists 1 MCP server for 1F3D9: Remote MCP server at 1f3d9.com.

Is the 1F3D9 API ready for AI agents?

1F3D9 has a Kin Score of 19.1 out of 100 (emerging) and an Agent Readiness score of 24.7 (agent-aware), scored by API Evangelist on 2026-11-06.

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.

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