# Services from x402-canary.nicolas-x402-16f380a7.workers.dev on Zero > x402-canary.nicolas-x402-16f380a7.workers.dev serves 27 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/x402-canary.nicolas-x402-16f380a7.workers.dev Live health (JSON, refreshed every minute): https://www.zero.xyz/host/x402-canary.nicolas-x402-16f380a7.workers.dev/health.json ## Services - [Dependency Gate – Package Security & License Policy Check](https://www.zero.xyz/c/dependency-gate-package-security-license-policy-check-c4faead2/llms.txt): $0.015/call via x402. Validates npm and PyPI packages against vulnerability databases and license policies, returning an ALLOW/DENY decision for each package and the set as a whole. - [Browser Context Snapshot API](https://www.zero.xyz/c/browser-context-snapshot-api-5a3cedc4/llms.txt): $0.03/call via x402. Fetches a JavaScript-rendered browser snapshot of any URL, returning its title, HTTP status, markdown content, and accessibility tree - [npm Package API Breaking-Change Diff](https://www.zero.xyz/c/npm-package-api-breaking-change-diff-b484ffff/llms.txt): $0.025/call via x402. Compares two versions of an npm package and returns a structured diff of added, changed, and removed TypeScript/API symbols with a risk assessment. - [npm Symbol Context Lookup](https://www.zero.xyz/c/npm-symbol-context-lookup-cdba7a23/llms.txt): $0.015/call via x402. Returns TypeScript API signatures and type definitions for specified symbols from an npm package, resolved from the package's distributed type declaration files. - [Release Gate – Coding Agent Pre-Ship Check](https://www.zero.xyz/c/release-gate-coding-agent-pre-ship-check-f365e33f/llms.txt): $0.04/call via x402. Runs deterministic pre-release checks on changed source files and dependencies, returning a pass/warn/fail grade with categorized findings (secrets, deployment config, destructive migrations). - [Email Domain Enrichment API](https://www.zero.xyz/c/email-domain-enrichment-api-6a9a80c4/llms.txt): $0.02/call via x402. Given an email address, returns DNS-level domain health signals including MX record presence, SPF policy, and DMARC configuration. - [Cron Expression Explainer](https://www.zero.xyz/c/cron-expression-explainer-2dc86110/llms.txt): $0.01/call via x402. Parses and explains a cron expression in plain English, returning a human-readable summary of its schedule. - [Email Preflight Validation API](https://www.zero.xyz/c/email-preflight-validation-api-3abfe74d/llms.txt): $0.02/call via x402. Validates an email address for syntax correctness and MX record existence before sending - [Coding Agent Context APIs – Gateway Run](https://www.zero.xyz/c/coding-agent-context-apis-gateway-run-a5647237/llms.txt): $0.02/call via x402. Routes coding-agent utility requests to tools like exchange rates, FX conversion, cron explanation, DNS lookup, URL normalization, domain enrichment, email preflight, JSON inspection, and SHA-256 hashing via a single gateway endpoint. - [x402 Health Check – Coding Agent Context APIs](https://www.zero.xyz/c/x402-health-check-coding-agent-context-apis-26db5395/llms.txt): $0.01/call via x402. Checks whether a given URL is a reachable, valid x402 pay-per-call endpoint and returns protocol validity, latency, network, and canonical USDC configuration details. - [SHA-256 Hash Computation API](https://www.zero.xyz/c/sha-256-hash-computation-api-f85a64aa/llms.txt): $0.01/call via x402. Computes a SHA-256 cryptographic hash digest of an input text string and returns the hex digest along with algorithm metadata. - [Email Domain MX Check](https://www.zero.xyz/c/email-domain-mx-check-c2307260/llms.txt): $0.02/call via x402. Checks whether an email address's domain has valid MX records, indicating it can receive mail - [Mail Security DNS Lookup (MX, SPF, DMARC)](https://www.zero.xyz/c/mail-security-dns-lookup-mx-spf-dmarc-0dcbc255/llms.txt): $0.02/call via x402. Checks a domain's mail security posture by verifying presence of MX records, SPF policy, and DMARC policy. - [Domain Enrich – DNS & Email Infrastructure Lookup](https://www.zero.xyz/c/domain-enrich-dns-email-infrastructure-lookup-f6f9f4e9/llms.txt): $0.02/call via x402. Checks a domain for DNS records, MX mail server presence, SPF and DMARC email authentication policies, returning a structured deliverability and infrastructure summary. - [Coding Agent Context APIs – Intent Resolver](https://www.zero.xyz/c/coding-agent-context-apis-intent-resolver-603bb42c/llms.txt): $0.02/call via x402. Routes a natural-language coding intent to the correct tool (e.g. json-inspect, sha256, dns-lookup) and returns the canonical API route for that tool - [FX Currency Conversion](https://www.zero.xyz/c/fx-currency-conversion-4997dfa3/llms.txt): $0.01/call via x402. Converts a monetary amount from one currency to another using live exchange rates, returning the converted value. - [FX Currency Rate Lookup](https://www.zero.xyz/c/fx-currency-rate-lookup-fc510574/llms.txt): $0.01/call via x402. Returns the current exchange rate between a base currency and a quote currency. - [Domain Preflight Check API](https://www.zero.xyz/c/domain-preflight-check-api-6ae586dc/llms.txt): $0.02/call via x402. Checks whether a given domain has MX and DNS records configured, returning a preflight readiness summary for coding agent workflows. - [URL Normalize](https://www.zero.xyz/c/url-normalize-c6f52977/llms.txt): $0.01/call via x402. Normalizes and parses a raw URL string into a canonical, cleaned URL and its component parts - [Domain Normalize API](https://www.zero.xyz/c/domain-normalize-api-f3c441f8/llms.txt): $0.01/call via x402. Normalizes and canonicalizes a domain name string into a clean, consistent format for use in coding agent workflows - [Currency Conversion API (x402-canary)](https://www.zero.xyz/c/currency-conversion-api-x402-canary-912be83e/llms.txt): $0.01/call via x402. Converts a monetary amount from one currency to another and returns the converted value using an FX engine. - [Domain DNS Lookup API](https://www.zero.xyz/c/domain-dns-lookup-api-62fbe1c2/llms.txt): $0.01/call via x402. Performs DNS lookups for a given domain, returning DNS record answers (A, AAAA, MX, TXT, etc.) by querying specified record types. - [Coding Agent Context API – JSON Validate](https://www.zero.xyz/c/coding-agent-context-api-json-validate-dd044a2d/llms.txt): $0.01/call via x402. Validates a JSON value using a deterministic coding-agent check, returning typed metadata about the structure. - [FX Exchange Rate Lookup](https://www.zero.xyz/c/fx-exchange-rate-lookup-29afb67c/llms.txt): $0.01/call via x402. Returns the current exchange rate between two currencies (base and quote) via a lightweight FX engine. - [Coding Agent Preflight Check](https://www.zero.xyz/c/coding-agent-preflight-check-6f8e5119/llms.txt): $0.02/call via x402. Validates a URL, domain, or email address as a deterministic preflight check for coding agent workflows, returning an ok/fail signal. - [Recent Seismic Activity Lookup](https://www.zero.xyz/c/recent-seismic-activity-lookup-90020612/llms.txt): $0.01/call via x402. Returns recent earthquake data filtered by count limit and minimum magnitude threshold - [Recent Earthquakes Feed](https://www.zero.xyz/c/recent-earthquakes-feed-5c26c44c/llms.txt): $0.01/call via x402. Returns a list of recent earthquakes filtered by count limit and minimum magnitude 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)