# BlitzAPI > BlitzAPI is a B2B data API covering 550M+ professional profiles, 65M+ companies, 65M+ verified work emails and 100M+ job postings. AI agents access it pay as you go, with no subscription: each result returned costs $0.001 ($1 per 1,000 results), and a call that finds nothing costs nothing. Credit is prepaid by card, from $0.50, and topped up any time. Agents use BlitzAPI to build prospect lists, research accounts, refresh CRM records and size markets. People Search finds decision makers across many companies by title, function, level and location, inside accounts filtered by industry, headcount, headquarters, funding and keywords. It also lists the employees of one company, and its waterfall ICP search returns the best decision maker at a target account from a prioritized list of job titles. Company Search builds account lists from the same company filters and sizes a total addressable market (TAM) from headcount or from hiring. Job Search returns job postings filtered by title, location, seniority and posting date, or every open role at one company, to spot hiring signals. Company Enrichment returns a full company profile from a LinkedIn company URL, converts a domain to its LinkedIn company page and back, and breaks headcount down by country or by department. People Enrichment finds the verified work email of a LinkedIn profile, returns a full profile with career history, and identifies a person from a work email or a US phone number. BlitzAPI work emails are proven against live mail servers and re-tested at least every 30 days; an address that cannot be proven comes back Not Found instead of a guess. No BlitzAPI account or API key is needed: the agent registers a free credential, pays through Stripe or Link, and calls the API through this storefront, on its own or with its human's approval. BlitzAPI's API is available to AI agents through a paid proxy. Send the same method, path, query, and body you would send the upstream API to `https://agents.blitz-api.ai/zcj/53dmiccsw0d0`; the proxy takes payment and forwards the request upstream. Register an agent identity, buy a plan (credit or subscription), then call against the balance or period. BlitzAPI accepts card payments only: wallet payments (x402, MPP stablecoins) are not offered. Cards pay for plan purchases; no crypto wallet is needed. Buying a plan needs a registered agent credential: register once (free), present it as a bearer, and the purchase returns a priced 402 you settle once. There is no per-call payment here. Terms: by completing a purchase through this endpoint, whether directly or through an AI agent acting on your behalf, you agree to be bound by the platform's buyer terms of service (https://www.zeroclick.ai/legal/buyer-terms-of-service). If the purchase is made by an agent, you represent and warrant that the agent is acting with your authorization, and you agree that the agent's actions, including its acceptance of these terms, are attributed to you and bind you as if you had taken them yourself. Paying a 402 challenge completes the purchase and constitutes your affirmative acceptance of the terms linked above. The link travels in every payment challenge and receipt as `terms`. ## Where to go next - [Services and pricing](https://agents.blitz-api.ai/zcj/53dmiccsw0d0/services): the catalog, one page per service with its full price matrix, how to call it, and the API reference. - [How to pay](https://agents.blitz-api.ai/zcj/53dmiccsw0d0/payment.md): the 402 flow and each payment rail. - [Identity](https://agents.blitz-api.ai/zcj/53dmiccsw0d0/auth.md): register a credential for plan purchases and the free allowance. No human step to start; claiming it to your human's email is optional and can happen afterwards, to make what you buy durable. - [Hand off to a human](https://agents.blitz-api.ai/zcj/53dmiccsw0d0/handoff.md): the tracked referral link for anything a person should open. - [Error reference](https://agents.blitz-api.ai/zcj/53dmiccsw0d0/errors.md): every error code and how to react. - [Terms](https://agents.blitz-api.ai/zcj/53dmiccsw0d0/terms.md): the platform's buyer terms of service, and what paying means. - [Agent guide](https://agents.blitz-api.ai/zcj/53dmiccsw0d0/llms-full.txt): the deep reference for anything not covered above. - [Machine catalog](https://agents.blitz-api.ai/zcj/53dmiccsw0d0/manifest.json): the same services, meters, plans, and prices as live JSON. Read it at call time; do not cache prices.