TARXAN

TARXAN Inc (TARX, Austin TX) builds a local-first AI agent runtime: free TARX_OS / TARX Desktop software for Apple Silicon Macs, a shell CLI that installs a local inference daemon and local MCP servers, an optional hosted "Supercomputer" reached through an OpenAI-compatible API (api.tarx.com/v1, model t-supercomputer), and dedicated "Black Box" and humanoid/quadruped hardware. Its public agent surface is a remote MCP server at mcp.tarx.com/mcp (22 anonymous tools, OAuth 2.0 + PKCE for private memory, RFC 8414/9728 metadata) advertised by an A2A 0.3.0 agent card at tarx.com/.well-known/agent-card.json and a prose "cairn" (we.txt, skill.md, courier.md) that tells visiting agents how to register a Soul through plain REST on tarx.com/api. No OpenAPI is published.

TARXAN is listed with 3 APIs on the APIs.io network. Tagged areas include Company, AI Agents, Agent Runtime, Local-First AI, and Private AI.

TARXAN’s developer surface includes documentation, getting-started guide, support, engineering blog, pricing, signup flow, changelog, and 36 more developer resources.

🌐 Visit website 📡 Source on GitHub

50.3/100 developing ▬ flat Agent 29/100 agent ready Front door AI 5/6 prominent Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0

3 APIs 1 MCP Servers

Company AI Agents Agent RuntimeLocal-First AIPrivate AI MCP A2A LLM Inference Developer Tools Hardware Robotics

Kin Score

Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0

Composite quality — 50.3/100 · developing

Contract Quality 1.4 / 21

Developer Ergonomics 13.4 / 17

Access Clarity 13.0 / 17

Operational Transparency 3.2 / 11

Contract Governance 1.9 / 10

Discoverability 6.8 / 9

Regulatory Posture 6.1 / 15

Agent readiness — 29/100 · agent ready

Machine-Readable Contract 0 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 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 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

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/.

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/tarx-com: 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 3

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

TARX Remote MCP Server

Streamable-HTTP MCP server (serverInfo tarx 3.18.0, protocol 2025-06-18) exposing 22 tools, 5 prompts and 5 resources anonymously — public TARX context search/fetch, install gui...

TARX Supercomputer API

OpenAI-compatible hosted inference API. GET /v1/models lists the single model t-supercomputer (owned_by tarx, OpenRouter slug tarx/t-supercomputer) without a key; POST /v1/chat/...

TARX Courier and Souls API

Plain REST endpoints on tarx.com documented only for visiting AI agents in we.txt, skill.md and courier.md: GET /api/courier/ping and /api/courier/tick (signed heartbeat naming ...

MCP Servers 1

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

TARXAN MCP Server

Remote MCP server at mcp.tarx.com over streamable HTTP requiring OAuth; 22 tools listed.

MCP SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Tarx Com Plans Pricing

6 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Tarx Com Rate Limits

0 limits

RATE LIMITS

JSON Schema 1

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

TARX Partner Sandbox Fixture

11 properties

JSON SCHEMA

Examples 1

Example request and response payloads for these APIs.

Tarx Com Partner Sandbox Fixture

11 fields

EXAMPLE

Security Posture 3

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

Tarx Com Authentication

3 schemes

SECURITY

Tarx Com Domain Security

TLSv1.2 · HSTS · DNSSEC · DMARC

SECURITY

Tarx Com Vulnerability Disclosure

Hackerone

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Tarx Com Scopes

3 scopes

SCOPES

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Tarx Com Agentic Access

22 operations · 3 acting

AGENTIC

Resources

Get Started 4

Portal, sign-up, and the first successful call

DeveloperPortal

GettingStarted

SignUp

Sandbox

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

JSONSchema

JSONSchema

Agent Surfaces 7

MCP servers, agent skills, and machine-readable catalogs

MCPServer

LLMsTxt

LLMsTxt

LLMsTxt

WellKnown

AgentSkill

AgenticAccess

Scroll for all 7

Design & Contract 4

Pagination, idempotency, versioning, errors, and events

Conformance

ErrorCatalog

Lifecycle

Conventions

Build 4

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

Packages

CLI

Examples

Access & Security 6

Authentication, authorization, and security posture

DomainSecurity

Security

Authentication

OAuthScopes

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 5

Status, limits, changes, and where to get help

Support

Contact

ChangeLog

ChangeLog

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

Pricing

TermsOfService

PrivacyPolicy

Plans

Company 4

The organization behind the API

Website

Blog

Blog

About

Other 3

Properties that don't map to a standard resource type

AgentCard

AgentCard

RegulatoryPosture

RegulatoryPosture

DataSubjectRequest

DataSubjectRequest

Source (apis.yml)

aid: tarx-com
name: TARXAN
description: 'TARXAN Inc (TARX, Austin TX) builds a local-first AI agent runtime: free TARX_OS / TARX Desktop software for
  Apple Silicon Macs, a shell CLI that installs a local inference daemon and local MCP servers, an optional hosted "Supercomputer"
  reached through an OpenAI-compatible API (api.tarx.com/v1, model t-supercomputer), and dedicated "Black Box" and humanoid/quadruped
  hardware. Its public agent surface is a remote MCP server at mcp.tarx.com/mcp (22 anonymous tools, OAuth 2.0 + PKCE for
  private memory, RFC 8414/9728 metadata) advertised by an A2A 0.3.0 agent card at tarx.com/.well-known/agent-card.json and
  a prose "cairn" (we.txt, skill.md, courier.md) that tells visiting agents how to register a Soul through plain REST on tarx.com/api.
  No OpenAPI is published.'
image: https://tarx.com/tarx-logo.png
url: https://raw.githubusercontent.com/api-evangelist/tarx-com/refs/heads/main/apis.yml
x-type: company
x-source: harvest:a2a-registry
x-tier: profiled
x-tier-reason: full enrichment pass 2026-09-19 (local-v3)
specificationVersion: '0.20'
created: '2026-09-19'
modified: '2026-09-19'
tags:
- Company
- AI Agents
- Agent Runtime
- Local-First AI
- Private AI
- MCP
- A2A
- LLM
- Inference
- Developer Tools
- Hardware
- Robotics
apis:
- name: TARX Remote MCP Server
  description: Streamable-HTTP MCP server (serverInfo tarx 3.18.0, protocol 2025-06-18) exposing 22 tools, 5 prompts and 5
    resources anonymously — public TARX context search/fetch, install guidance, runtime status, GitHub repo context — with
    private memory and session tools gated on OAuth 2.0 authorization_code + PKCE (scopes public, user, chatgpt_private_memory).
    A local stdio variant is installed by the TARX CLI. This is also the endpoint the A2A agent card declares as its url.
  image: https://tarx.com/tarx-logo.png
  humanURL: https://howdy.tarx.com/mcp
  baseURL: https://mcp.tarx.com/mcp
  tags:
  - MCP
  - AI Agents
  - Agent Memory
  properties:
  - type: MCPServer
    url: mcp/tarx-com-mcp.yml
  - type: Documentation
    url: https://docs.tarx.com/developers/mcp
  - type: Documentation
    name: OpenAI Agents MCP
    url: https://docs.tarx.com/developers/mcp-openai-agents
  - type: Documentation
    name: Claude Desktop MCP
    url: https://docs.tarx.com/developers/mcp-claude-desktop
  - type: OAuthScopes
    url: scopes/tarx-com-scopes.yml
  - type: Authentication
    url: authentication/tarx-com-authentication.yml
  - type: AgenticAccess
    url: agentic-access/tarx-com-agentic-access.yml
- name: TARX Supercomputer API
  description: OpenAI-compatible hosted inference API. GET /v1/models lists the single model t-supercomputer (owned_by tarx,
    OpenRouter slug tarx/t-supercomputer) without a key; POST /v1/chat/completions requires a per-account TARX API key (401
    tarx_api_key_required). The docs describe the same request shape against a local runtime at 127.0.0.1:11440 with model
    tarx-local. Hosted capacity is labelled Pilot-ready; no OpenAPI, rate limits or pricing are published for it.
  image: https://tarx.com/tarx-logo.png
  humanURL: https://docs.tarx.com/developers/api
  baseURL: https://api.tarx.com/v1
  tags:
  - LLM
  - Inference
  - Chat Completions
  properties:
  - type: Documentation
    url: https://docs.tarx.com/developers/api
  - type: APIReference
    url: https://docs.tarx.com/reference/api
  - type: ErrorCatalog
    url: errors/tarx-com-problem-types.yml
  - type: Authentication
    url: authentication/tarx-com-authentication.yml
- name: TARX Courier and Souls API
  description: 'Plain REST endpoints on tarx.com documented only for visiting AI agents in we.txt, skill.md and courier.md:
    GET /api/courier/ping and /api/courier/tick (signed heartbeat naming the agent card and cairn hash), POST /api/courier/introduce
    (hand TARX a peer agent-card URL), POST /api/souls (register a "Soul" — a chosen context bundle; letter expires in 72
    hours, key 30 days after last touch), POST /api/souls/:id/touch, and GET /api/rail/census (daily aggregate counts). No
    authentication is documented. robots.txt disallows /api/ for crawlers.'
  image: https://tarx.com/tarx-logo.png
  humanURL: https://tarx.com/skill.md
  baseURL: https://tarx.com/api
  tags:
  - AI Agents
  - Agent Discovery
  properties:
  - type: Documentation
    name: we.txt (cairn hub)
    url: https://tarx.com/we.txt
  - type: Documentation
    name: courier.md
    url: https://tarx.com/courier.md
  - type: AgentSkill
    url: skills/tarx-com-skill.md
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: DomainSecurity
  url: security/tarx-com-domain-security.yml
- type: Website
  url: https://tarx.com/
- type: Documentation
  url: https://docs.tarx.com
- type: DeveloperPortal
  url: https://howdy.tarx.com
- type: GettingStarted
  url: https://docs.tarx.com/start-here/quickstart
- type: Support
  url: https://tarx.com/support
- type: Contact
  url: https://docs.tarx.com/reference/contact
- type: Blog
  url: https://tarx.com/dispatches
- type: Blog
  name: Substack
  url: https://tarx.substack.com/
- type: GitHubOrganization
  url: https://github.com/tarx-ai
- type: Pricing
  url: https://docs.tarx.com/pricing/overview
- type: SignUp
  url: https://tarx.com/join
- type: TermsOfService
  url: https://tarx.com/terms
- type: PrivacyPolicy
  url: https://tarx.com/privacy
- type: ChangeLog
  url: https://docs.tarx.com/reference/changelog
- type: ChangeLog
  url: changelog/tarx-com-changelog.yml
- type: Security
  url: https://tarx.com/security
- type: About
  url: https://tarx.com/about
- type: AgentCard
  url: a2a/tarx-com-a2a.yml
- type: MCPServer
  url: mcp/tarx-com-mcp.yml
- type: LLMsTxt
  url: llms/tarx-com-llms.txt
- type: LLMsTxt
  name: docs.tarx.com llms.txt
  url: llms/tarx-com-docs-llms.txt
- type: LLMsTxt
  name: howdy.tarx.com llms.txt
  url: llms/tarx-com-howdy-llms.txt
- type: WellKnown
  url: well-known/tarx-com-well-known.yml
- type: AgentSkill
  url: skills/_index.yml
- type: AgenticAccess
  url: agentic-access/tarx-com-agentic-access.yml
- type: Packages
  url: packages/tarx-com-packages.yml
- type: CLI
  url: cli/tarx-com-cli.yml
- type: Authentication
  url: authentication/tarx-com-authentication.yml
- type: OAuthScopes
  url: scopes/tarx-com-scopes.yml
- type: Conformance
  url: conformance/tarx-com-conformance.yml
- type: ErrorCatalog
  url: errors/tarx-com-problem-types.yml
- type: Lifecycle
  url: lifecycle/tarx-com-lifecycle.yml
- type: Conventions
  url: conventions/tarx-com-conventions.yml
- type: Plans
  url: plans/tarx-com-plans-pricing.yml
- type: RateLimits
  url: rate-limits/tarx-com-rate-limits.yml
- type: Sandbox
  url: sandbox/tarx-com-sandbox.yml
- type: JSONSchema
  name: Partner sandbox fixture schema
  url: json-schema/tarx-com-partner-sandbox-fixture-schema.json
- type: Examples
  name: Partner sandbox fixture
  url: examples/tarx-com-partner-sandbox-fixture.json
- type: RegulatoryPosture
  url: regulatory/tarx-com-regulatory-posture.yml
- type: DataSubjectRequest
  url: https://tarx.com/terms
- type: VulnerabilityDisclosure
  url: security/tarx-com-vulnerability-disclosure.yml
- type: Security
  url: security/tarx-com-vulnerability-disclosure.yml
x-contract-discovery:
  checked: '2026-09-19'
  openapi: none — tarx.com, docs.tarx.com, mcp.tarx.com /openapi.json|.yaml|swagger.json|api-docs|docs|redoc 404; api.tarx.com/v1/openapi.json
    JSON 404 ("Unknown endpoint"), every non-/v1 path on api.tarx.com Cloudflare 530; ai-plugin.json's api.url (mcp.tarx.com/openai-tools)
    is a function-calling export, not OpenAPI
  graphql: none — no /graphql surface referenced anywhere
  mcp: live — anonymous tools/list at https://mcp.tarx.com/mcp, saved verbatim (mcp/tarx-com-mcp-tools.json)
  a2a: live — https://tarx.com/.well-known/agent-card.json (and legacy agent.json, and www), saved verbatim
  asyncapi_webhooks: none — provider states no webhook contract is live
  grpc_wsdl_ogc: none
x-pointer-verification:
  checked: '2026-09-19'
  note: Every external common[] and properties[] URL above was fetched during this pass and returned 200 (tarx.com/pricing
    was NOT used because it 308s to /shop; status.tarx.com does not resolve; tarx.com/docs is 404 — none of those are wired).
x-enrichment:
  date: '2026-09-19'
  status: enriched
  artifacts_added: 36
  pass: local-v3
x-legal-name: TARXAN Inc

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