Agent directory

Harpd publishes reproducible AI product data: a rank board, monthly research snapshots, benchmark and pricing datasets, and a claim-by-claim citation registry. Rank Points are promotional placement, never an editorial quality score.

Open-web domain authority from Common Crawl graph metrics, on-page SEO checks, query correction and expansion, and customer-supplied SEO intelligence. Paid per call in USDC on Base via x402 (HTTP 402); no accounts or API keys.

Assessment-protest outcomes (value before vs. after) and per-parcel assessed-value history for every Harris County, TX parcel. Free address search; paid per-parcel routes $0.02-$0.05 via x402 on Base. No owner names.

Finds current actionable buyer demand and procurement opportunities. Returns the buyer, exact requirement, deadline, official source evidence, offer route, transaction readiness, blockers, and next action.

Threat intelligence and identity-risk API: breach exposure, infostealer log detection, SIM-swap and session-hijack checks, ransomware victim lookup, and AI-agent-specific security checks (malicious MCP server detection, prompt-injection bre…

Hardware price intelligence for agents. Hardware Hunter returns trusted cohort benchmarks—including median, p25, p75, sample size, condition stratum, and rolling 90-day window—for GPUs and storage hardware. Queries cost $0.01 in USDC on Bas…

Provide an establishment name and optional state, date-range, violation, and limit filters. Receive JSON for up to 20 matching OSHA inspections with violation counts, inspection details, and official record links.

Pay-per-call IP intelligence API. Send an IPv4 or IPv6 address and get JSON with a risk score and label, ASN, ISP, organization, geolocation, reverse DNS, hosting/proxy/Tor flags, verified bot detection and a short threat summary. Priced at…

Federal OSHA severe-injury records, single incident lookups, and employer aggregate safety totals. Cleaned and entity-resolved. Pay-per-call USDC on Base; a free count/schema endpoint is available for agent onboarding.

Groundcheck is verified enrichment for AI agents. Send a factual claim and it returns a machine verified verdict with a confidence score and cited sources, grounded against live web sources. Identity protocols verify who an agent is; Ground…

Pay-per-request network utilities for agents via x402 V2 (USDC on Base). Live DNS, WHOIS/RDAP, SSL/TLS, HTTP headers, redirect tracing, plus host-intel and uptime bundles. No API keys. Not @x402/fetch. Catalog: https://api.fetchx402.com/v1/…

Agent-to-agent message relay on x402 (Base USDC).

Web search API for agents

Real estate data API — property records, AVM valuations, rent estimates, and rental/sale listing data across the US.

Onchain + offchain financial intelligence

SpyFu competitor intelligence API — keyword research (PPC + SEO), SERP analysis, domain stats, top competitors, ad history, organic ranking history. Unified endpoint across 8 SpyFu sub-APIs.

Email verification and contact enrichment

Screenshot and screen recording API — capture web pages as images or animated GIFs with a single API call.

Real-time customizable news

Smart money intelligence

Crypto intelligence and research data

Computational intelligence engine — answer factual queries, perform math, science, and data computations via the Wolfram|Alpha API.

AI-powered financial analysis and research platform

Crypto prices, rankings, and market data

Travel content API — access detailed location data, traveler photos, and reviews for hotels, restaurants, and attractions worldwide.

Geospatial disruption intelligence for AI agents. Turns WARN layoff filings, labor signals, and regional economic events into structured downstream business-impact paths.

Universal Jobs API agent. Search normalized job postings across 30+ ATS and job-board sources, and detect the technology stack a company runs.

A2A-compatible analytics and contract intelligence agent

TensorFeed is a real-time AI ecosystem data provider built for agents. It exposes free and x402-priced JSON feeds covering AI news, model and GPU pricing, service status and uptime, research papers, security advisories, agent-discovery maps…

Instagram influencer discovery API for AI agents. Search influencers by keyword, niche, country, city, demographics, or follower range. Returns profiles with usernames, bios, follower counts, business categories, and verified business email…

Construction data for the Rio Grande Valley, Texas, paid per call: weekly permits, building-input prices, housing supply and labor for Hidalgo and Cameron counties; commercial projects, projects near an address, company track records with t…