"HAL" matching MCP servers:

Enables AI agents to search projects, retrieve and validate CDOP documents, explain schemas, list enums, and inspect state machines over Streamable HTTP, returning HAL links so agents can continue navigating the API.

Enables sentence-level factual grounding verification and hallucination detection for RAG outputs via a native MCP server, providing deterministic scoring and structured telemetry.

Provides access to 70 paid APIs as MCP tools with per-call and session budgets, paying via x402/USDC on Base without requiring an account or login. Includes a built-in allowlist of hosts and safe defaults to prevent unintended payments.

MCP server for Hyperliquid that provides read-only on-chain wallet analytics. Enables natural-language queries about positions, fills, funding, and realized PnL for any public address.

Get phone numbers in 120+ countries and manage calls, texts, and email through one Hail account. Hail handles registration, including US A2P 10DLC, and tracks email deliverability. Use MCP, the API, or the CLI without stitching separate providers together.

Enables agents to deploy software via GitHub Actions only with a signed receipt, providing gated tools to resolve refs, list deployments/environments, and dispatch pipelines for a specific commit.

A comprehensive MCP server that enables AI assistants to interact with Home Assistant, control smart home devices, query states, execute services, and manage automations via natural language.

Connects AI assistants to Cal.com for managing bookings, event types, and availability through natural language.

A lightweight, self-hosted MCP server that connects LLM-based agents to Red Hat Lightspeed services, enabling natural language querying of read-only (and optionally write) operations across Advisor, Image Builder, Inventory, Planning, Remediations, and Vulnerability services.

Provides secure, read-only semantic access to Home Assistant entities, areas, floors, and domain summaries for MCP clients like ChatGPT and Codex.

Provides persistent, scoped shared memory for collaborating AI agents, with tools for storing observations, semantic recall, and handoff workflows. Backed by PostgreSQL and exposed through MCP.

Detect fabrication and hallucination in any LLM output. Score responses from GPT-4o, Claude, Gemini, Llama and 30+ models. Free tier included.

Enables estimating LLM hallucination and confabulation by clustering sampled responses into semantic equivalence classes and computing semantic entropy. It provides a plug-and-play validation filter for agent pipelines using the MCP protocol.

Enables detecting LLM hallucinations and confabulations by clustering sampled responses into semantic equivalence classes and computing semantic entropy.

Enables deterministic auditing of RAG retrieval faithfulness and hallucination scores, providing structured JSON output for AI agents and MCP-compliant clients.

Enables sentence-level factual grounding verification and hallucination detection for RAG outputs via MCP, with deterministic scoring and structured telemetry.

Enables autonomous agents and MCP clients to decompose text into atomic claims and verify them against reference knowledge, detecting ungrounded claims, numerical contradictions, and hallucinated entities.