HUD
HUD (Human Union Data, Inc.) is a platform for building reinforcement-learning environments, tasks and benchmarks used to train and evaluate AI agents and models. Teams create environments with the open-source hud Python SDK and CLI or import Harbor tasks, run evaluations across frontier models, inspect traces, run automated QA agents that detect grader mistakes and reward hacking, train models on their own environments, and can list task data on DataVendor. The platform is exposed through a REST API at api.beta.hud.ai (routes under /v2, team API-key authentication).
HUD publishes 24 API contracts indexed on the APIs.io network, including Builds API, Byok Credentials API, Checks API, and 21 more. Tagged areas include Company, Artificial Intelligence, Reinforcement Learning, AI Evaluation, and AI Agents.
The HUD catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.
HUD’s developer surface includes CLI, changelog, authentication, documentation, API reference, getting-started guide, engineering blog, and 39 more developer resources.
What this lets a business do 3
Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →
Kin Score
APIs 24
Individual APIs this provider publishes, each with its own machine-readable definition.
HUD Builds API
The builds API from HUD — 16 operation(s) for builds.
HUD Byok Credentials API
The byok-credentials API from HUD — 2 operation(s) for byok-credentials.
HUD Checks API
The checks API from HUD — 4 operation(s) for checks.
HUD Completions API
The completions API from HUD — 1 operation(s) for completions.
HUD Data API
The data API from HUD — 7 operation(s) for data.
HUD Env Vars API
The env-vars API from HUD — 4 operation(s) for env-vars.
HUD Imports API
The imports API from HUD — 7 operation(s) for imports.
HUD Inference API
The inference API from HUD — 1 operation(s) for inference.
HUD Instances API
The instances API from HUD — 2 operation(s) for instances.
HUD Jobs API
The jobs API from HUD — 19 operation(s) for jobs.
HUD Limits API
The limits API from HUD — 3 operation(s) for limits.
HUD Member Secrets API
The member-secrets API from HUD — 2 operation(s) for member-secrets.
HUD Models API
The models API from HUD — 10 operation(s) for models.
HUD OAuth API
The oauth API from HUD — 1 operation(s) for oauth.
HUD Qa Agents API
The qa-agents API from HUD — 5 operation(s) for qa-agents.
HUD Qa API
The qa API from HUD — 3 operation(s) for qa.
HUD Registry API
The registry API from HUD — 4 operation(s) for registry.
HUD Rollouts API
The rollouts API from HUD — 6 operation(s) for rollouts.
HUD Storage API
The storage API from HUD — 3 operation(s) for storage.
HUD Tasks API
The tasks API from HUD — 9 operation(s) for tasks.
HUD Tasksets API
The tasksets API from HUD — 5 operation(s) for tasksets.
HUD Teams API
The teams API from HUD — 5 operation(s) for teams.
HUD Traces API
The traces API from HUD — 11 operation(s) for traces.
HUD Usage API
The usage API from HUD — 2 operation(s) for usage.
Scroll for all 24
MCP Servers 1
Model Context Protocol servers that expose these APIs to AI agents.
HUD Platform MCP
Remote MCP server at api.beta.hud.ai over streamable HTTP requiring an API key; 8 tools listed.
MCP SERVERAgent Skills 4
Packaged agent skills for driving this provider's APIs from an AI assistant.
hud-ai-diagnose-eval-run
AGENT SKILLhud-ai-explore-catalog
AGENT SKILLhud-environment-builder
AGENT SKILLhud-ai-run-qa-checks
AGENT SKILLPricing Plans 1
Published pricing tiers and plan structures.
Hud Ai Plans Pricing
PLANSRate Limits 1
Documented rate limits and quota policies.
Hud Ai Rate Limits
RATE LIMITSSemantic Vocabularies 1
JSON-LD contexts and semantic vocabularies used across these APIs.
Hud Ai Context
JSON-LDSpectral Rules 1
Spectral governance rulesets for linting and validating these APIs.
HUD API Rules
SPECTRALOpenAPI Overlays 1
Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.
Hud Ai Openapi Overlay
GENERATEDJSON Schema 6
Standalone JSON Schema definitions for this provider's data models.
BuildRegisterResponse
JSON SCHEMABuildResponse
JSON SCHEMAModelResponse
JSON SCHEMARegistryDetailResponse
JSON SCHEMATraceAnalysisContextResponse
JSON SCHEMATraceInfoResponse
JSON SCHEMASecurity Posture 2
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Scopes 1
OAuth scopes governing access to this provider's APIs.
Agentic Access 1
Recommended x-agentic-access execution contracts for AI agents.
Resources
Get Started 2
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 6
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 10
Pagination, idempotency, versioning, errors, and events
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Build 6
SDKs, sample code, and the tooling you integrate with
Access & Security 4
Authentication, authorization, and security posture
Operate 4
Status, limits, changes, and where to get help
Commercial 3
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Other 6
Properties that don't map to a standard resource type
Source (apis.yml)
HUD API — frequently asked questions
Does HUD have an API?
Yes. APIs.io lists 24 APIs from HUD, including HUD Builds API, HUD Byok Credentials API and HUD Checks API, and 21 more.
Is there an OpenAPI specification for the HUD API?
Yes. APIs.io indexes 24 OpenAPI specifications for HUD, each linked for download from this page.
How do I authenticate with the HUD API?
HUD documents its authentication (3 schemes). The details are profiled on APIs.io as Hud Ai Authentication.
How much does the HUD API cost?
APIs.io lists 3 pricing plans for HUD, with each plan's price, limits and inclusions under Pricing Plans on this page.
Does HUD have an MCP server?
Yes. APIs.io lists 1 MCP server for HUD: Remote MCP server at api.beta.hud.ai over streamable HTTP requiring an API key; 8 tools listed.
Is the HUD API ready for AI agents?
HUD has a Kin Score of 61.4 out of 100 (strong) and an Agent Readiness score of 58.2 (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.