# Services from tdagentutility.co.uk on Zero > tdagentutility.co.uk serves 24 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero. Canonical page: https://www.zero.xyz/host/tdagentutility.co.uk Live health (JSON, refreshed every minute): https://www.zero.xyz/host/tdagentutility.co.uk/health.json ## Services - [TD Agent Utility · Email Verification](https://www.zero.xyz/c/td-agent-utility-email-verification-132b4c22/llms.txt): $0.002/call via x402. Validates an email address by checking syntax, DNS existence, MX records, disposable domain status, and mailbox existence - [TD Agent Utility – Verify Page](https://www.zero.xyz/c/td-agent-utility-verify-page-c98d861d/llms.txt): $0.05/call via x402. Performs a live browser-level verification of a web page URL, confirming it resolves correctly and returning the final URL, HTTP result status, and check timestamp. - [TD Agent Utility · Inbox Create](https://www.zero.xyz/c/td-agent-utility-inbox-create-70a7e40b/llms.txt): $0.003/call via x402. Creates a temporary callback inbox that can receive webhook events from website/deployment verification checks, returning an inbox ID and callback URL with configurable TTL. - [TD Agent Utility · Change Check (Website & Deployment Verification)](https://www.zero.xyz/c/td-agent-utility-change-check-website-deployment-verification-735a3d09/llms.txt): $0.006/call via x402. Checks whether a previously-seen URL has changed by comparing current HTTP, DNS, TLS, and Chromium snapshot data against a stored baseline, returning a diff and pass/fail status. - [TD Agent Utility – Site Map Verification](https://www.zero.xyz/c/td-agent-utility-site-map-verification-751f8797/llms.txt): $0.005/call via x402. Fetches and validates a website's sitemap, checking URL count, robots.txt status, and structural integrity with deterministic evidence for AI agents. - [TD Agent Utility – Checkpoint Save (Website & Deployment Verification)](https://www.zero.xyz/c/td-agent-utility-checkpoint-save-website-deployment-verification-28be0176/llms.txt): $0.002/call via x402. Saves a verification checkpoint for a website or deployment, storing the result of HTTP, DNS, TLS, and Chromium screenshot checks for later retrieval. - [TD Agent Utility · Website & Deployment Verification – State Get](https://www.zero.xyz/c/td-agent-utility-website-deployment-verification-state-get-97fa255a/llms.txt): $0.001/call via x402. Retrieves the stored verification state record for a previously checked website or deployment, returning cached HTTP/DNS/TLS/screenshot evidence. - [TD Agent Utility – URL Probe & HTTP Verification](https://www.zero.xyz/c/td-agent-utility-url-probe-http-verification-9e3fbac4/llms.txt): $0.005/call via x402. Performs a deterministic HTTP reachability check on a given URL and returns the final resolved URL, HTTP result status, and timestamp of the check. - [TD Agent Utility · OpenAPI Specification Validator](https://www.zero.xyz/c/td-agent-utility-openapi-specification-validator-5c08bbff/llms.txt): $0.003/call via x402. Validates an OpenAPI specification URL or document, checking parse validity, operation completeness, schema correctness, and security schemes, returning a scored report. - [TD Agent Utility · Read Page (Website Content Extraction)](https://www.zero.xyz/c/td-agent-utility-read-page-website-content-extraction-94b23660/llms.txt): $0.008/call via x402. Fetches and extracts the full content of a web page — including title, headings, main text, links, and markdown — using HTTP or a headless Chromium browser. - [TD Agent Utility – Render Page (Browser Screenshot & Deployment Verification)](https://www.zero.xyz/c/td-agent-utility-render-page-browser-screenshot-deployment-verification-81095542/llms.txt): $0.02/call via x402. Loads a URL in a headless browser and returns a pass/fail verification result with the final resolved URL and timestamp - [TD Agent Utility · PDF Extract](https://www.zero.xyz/c/td-agent-utility-pdf-extract-49b384d7/llms.txt): $0.005/call via x402. Extracts text and metadata from PDF documents, returning page-level content, combined text, and OCR indicators with a deterministic pass/fail result. - [TD Agent Utility · x402 Ping (HTTP/DNS/TLS/Screenshot Verification)](https://www.zero.xyz/c/td-agent-utility-x402-ping-http-dns-tls-screenshot-verification-ea3d968c/llms.txt): $0.001/call via x402. Performs a live HTTP connectivity ping and deployment health check on a website, returning a deterministic PASS/REVIEW/ISSUE result with x402 V2 metadata. - [TD Agent Utility – Site Crawl Verification](https://www.zero.xyz/c/td-agent-utility-site-crawl-verification-8a5fbe37/llms.txt): $0.02/call via x402. Crawls a target website and returns HTTP response data, crawl statistics, and pass/fail verification status for deployment validation. - [TD Agent Utility · PDF Table Extraction](https://www.zero.xyz/c/td-agent-utility-pdf-table-extraction-e77d2564/llms.txt): $0.01/call via x402. Extracts tabular data from PDF documents and returns structured table data with metadata about the extraction method and page count. - [TD Agent Utility · PDF OCR](https://www.zero.xyz/c/td-agent-utility-pdf-ocr-1652a356/llms.txt): $0.02/call via x402. Extracts text from PDF documents using OCR, returning per-page and combined text with language detection and result status - [TD Agent Utility – Checkpoint Load (Website & Deployment Verification)](https://www.zero.xyz/c/td-agent-utility-checkpoint-load-website-deployment-verification-66076342/llms.txt): $0.001/call via x402. Retrieves a previously stored verification checkpoint record for a website or deployment, returning cached HTTP, DNS, TLS, and screenshot evidence. - [TD Agent Utility – State Put (Persistent Key-Value Store)](https://www.zero.xyz/c/td-agent-utility-state-put-persistent-key-value-store-710d2346/llms.txt): $0.002/call via x402. Stores a versioned key-value state entry with TTL metadata, returning a status record with timestamps, size, version, and result status. - [TD Agent Utility · Lock-Release Verification](https://www.zero.xyz/c/td-agent-utility-lock-release-verification-3971080f/llms.txt): $0.001/call via x402. Verifies whether a deployment lock has been released by checking HTTP, DNS, TLS, and Chromium-based evidence for a target site - [TD Agent Utility · Inbox Read](https://www.zero.xyz/c/td-agent-utility-inbox-read-524dc1bd/llms.txt): $0.001/call via x402. Reads pending verification events from an agent's inbox, returning queued HTTP/DNS/TLS/screenshot results or status for a prior verification job. - [TD Agent Utility – State Delete](https://www.zero.xyz/c/td-agent-utility-state-delete-5756ca86/llms.txt): $0.001/call via x402. Deletes previously cached verification state for a target URL, clearing stored HTTP, DNS, TLS or screenshot evidence so fresh checks can be run. - [TD Agent Utility · Lock Acquire](https://www.zero.xyz/c/td-agent-utility-lock-acquire-1c2d85f0/llms.txt): $0.001/call via x402. Acquires a distributed lock token as a coordination primitive before initiating website/deployment verification checks - [TD Agent Utility · Counter Increment](https://www.zero.xyz/c/td-agent-utility-counter-increment-71ec9ded/llms.txt): $0.001/call via x402. Increments a named counter and returns the current value with metadata, used as a lightweight stateful utility within the website/deployment verification suite - [TD Agent Utility · Inbox Delete](https://www.zero.xyz/c/td-agent-utility-inbox-delete-3a0abe9d/llms.txt): $0.001/call via x402. Deletes a stored verification inbox entry and returns a deterministic pass/fail result with deletion status and warnings Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently. - [Zero catalog index](https://www.zero.xyz/llms.txt)