MCP servers for Perplexity

Meaning of HTTP 504.

Meaning of HTTP 505.

Check seven declared HTTP security header families without returning raw values

Send many HTTP/API requests with retries and rate limits; get status, headers and JSON back.

Social survey and on-site execution service consultation: Inquire about our service capabilities and pricing for satisfaction surveys…

Read Hub Planner resources, projects, bookings and timesheets; create clients and time entries.

MCP server for the HubSpot Integrations Center HubDB: search and retrieve integration data.

HubSpot MCP server: 9 tools, every client portal on one connector. Writes preview first.

75 paid agent tools: website audits and research; BM25, MiniLM vector and hybrid discovery are free.

Cross-venue prediction market odds (Polymarket, Kalshi, PredictIt, Manifold) with arbitrage signals

Search for books and book-related products, with access to product and delivery details

Search Hugging Face models, datasets, Spaces, and docs; anonymous users get a standard Hub toolset.

New HF datasets: releases, licenses, updates. $0.01/query. Be born in one call — free testnet funds.

HuggingFace trending models — what's hot now. $0.01/query. Be born in one call — free testnet funds.

Create and manage real-world Huint photo verification tasks via hosted streamable HTTP.

Dutch rental and for-sale listings, CBS area figures and Huisly's housing guides, read-only.

Huizhi Travel B2B MCP: search and compare hotels and attraction tickets.

Human execution API for AI agents needing voluntary help with physical-world tasks.

JPL-referenced Human Design charts for AI agents: bodygraph, transit, composite, Penta, DreamRave.

Human Design bodygraph, type, authority, profile, gates and channels for AI agents.

A physical postal address in Germany for AI agents. A human opens, scans and forwards your mail.