Development x402 offerings

Look up MIME content types by type substring or file extension, or list a category — covering text, application, image, audio, video, font and multipart types used in web APIs. Use this when an agent needs to content-Type lookup by type or file extension.

Split text into retrieval-friendly chunks with a token budget and sentence-aware boundaries. Overlap between consecutive chunks preserves context across splits — the standard preparation step before embedding. Use this when an agent needs to rAG-ready chunks with token budgets and overlap.

Validate JSON with precise error messages, pretty-print it with any indent, and inspect its top-level type and element counts. Use this when an agent needs to validate, pretty-print and inspect JSON.

Reference database of HTTP response status codes with phrase, category and explanation. Look up a specific code or list a whole category (1xx–5xx). Use this when an agent needs to look up any HTTP status code's meaning.

Detect the technologies a website uses (CMS, frameworks, analytics, CDN, web server, ecommerce, tag managers ...) from its HTML, headers, cookies, meta tags and script URLs, matched against 7,600+ op…

Check dependencies before your coding agent installs them: up to 20 packages per call (npm, PyPI, crates.io, Go, Maven, NuGet, RubyGems), one decision each: ALLOW, CAUTION or BLOCK with reasons. Catc…

Search developer sources in one call: Hacker News stories (Algolia), GitHub repositories (by stars), npm packages (with weekly downloads), PyPI (exact package lookup, PyPI has no search API) and Stac…

Embeds 1 to 100 strings into semantic vectors via Venice. Tier shorthand: 'default' → gemini-embedding-2-preview (newest, recommended), 'fast' → text-embedding-bge-m3, 'openai-compat' → text-embedding-3-small. You can also pass a full Venice embedding model name. Returns a list of vectors aligned with input order. Use it for text embedding, vector embedding, Venice embeddings, Gemini embeddings, or BGE-M3.

Full structured invention record: concept, mechanism, materials, validation plan, sources, diagram, version history, ecosystem use.

Generates a detailed compatibility report evaluating interoperability, system requirements, and integration risks for products, models, or datasets.

Generates structured design scopes for AI projects and features.

Analyzes, diagnoses, and optimizes prompts to improve LLM responses by detecting issues and recommending concrete edits.

Run fast HTML accessibility heuristics for language, title, headings, images, links, buttons, and form controls.

Computes weighted pass rates and weighted scores from caller-labeled test outcomes, with deterministic category summaries. It does not run tests, validate labels, measure untested capabilities or establish deployment safety; the result is only as representative as the supplied evaluation set.

skills: {'id': 'check_health', 'name': 'Check Health', 'description': 'Site availability, robots.txt, AI crawler access (GPTBot, ClaudeBot, PerplexityBot), sitemap presence', 'tags': ['audit', 'http', 'x402', 'ai-visibility'], 'examples': [], 'input_modes': None, 'output_modes': None}, {'id': 'check_llms_txt', 'name': 'Check Llms Txt', 'description': 'llms.txt existence and quality check: sections, links, statistics', 'tags': ['audit', 'http', 'x402', 'ai-visibility'], 'examples': [], 'input_modes': None, 'output_modes': None}, {'id': 'check_schema', 'name': 'Check Schema', 'description': 'Schema.org JSON-LD detection: types found, FAQ schema, Organization schema', 'tags': ['audit', 'http', 'x402', 'ai-visibility'], 'examples': [], 'input_modes': None, 'output_modes': None}, {'id': 'check_agent_files', 'name': 'Check Agent Files', 'description': 'openapi.json, ai-plugin.json, x402 payment support detection', 'tags': ['audit', 'http', 'x402', 'ai-visibility'], 'examples': [], 'input_modes': None, 'output_modes': None}, {'id': 'check_mcp', 'name': 'Check Mcp', 'description': 'MCP discoverability: /.well-known/mcp.json, agent.json, MCP Server Card', 'tags': ['audit', 'mcp', 'x402', 'ai-visibility'], 'examples': [], 'input_modes': None, 'output_modes': None}, {'id': 'score_aeo', 'name': 'Score Aeo', 'description': 'Full AEO (AI Search Visibility) score 0-100 with detailed checks', 'tags': ['score', 'ai', 'x402', 'ai-visibility'], 'examples': [], 'input_modes': None, 'output_modes': None}, {'id': 'score_geo', 'name': 'Score Geo', 'description': 'Full GEO (Citation Readiness) score 0-100 with detailed checks', 'tags': ['score', 'ai', 'x402', 'ai-visibility'], 'examples': [], 'input_modes': None, 'output_modes': None}, {'id': 'score_agent', 'name': 'Score Agent', 'description': 'Full Agent Readiness score 0-100 with detailed checks', 'tags': ['score', 'ai', 'x402', 'ai-visibility'], 'examples': [], 'input_modes': None, 'output_modes': None}; conformance: fail

Cron Dialect Convert API: moves a schedule between crontab, GitHub Actions, Cron Hub, Quartz and Cloudflare Workers Cron Triggers so the target fires at exactly the same times - weekday numbers, either/both day rules, macros, time zones. $0.005 USDC per call, no account, no language model: what cannot run at the same times gets a paid CANNOT CONVERT verdict. POST JSON {source, target, schedule, timezone}; free example at https://api.aiskills402.com/v1/run/cron-dialect-convert/example

Agent Done Check: Stop False Success Reports — Stops an AI agent from reporting false success, or hallucinated completion: work it calls done that did not happen. Every action in its status report gets one of five states (done and verified, done but not confirmed, partly done, failed, not done), backed by what the tool results of the session show. Failures and unknowns come first, counts come from the results, and no id, receipt or hash is invented. When a result does show success, the agent sa…

Agent Report Audit: Which Claims the Log Supports — Audits the report an AI agent wrote about its own session against the tool log of that session. Every numbered claim of the report gets one of two verdicts, supported or not_supported, with the log line that decides it copied exactly. A claim is supported only when the log shows a call that did it, a complete output that shows success, the same object and scope, nothing later that undoes it, and every part of a compound claim. A command that w…

Code Review — Reviews a code change (a diff or a changed file pasted as text) and reports real problems ranked by severity — correctness bugs, security holes, data loss, missing error handling, edge cases, resource leaks — each with location, reason and a concrete fix in words. Use when asked to review code, a diff or a pull request, check a change for bugs, or find security problems in a snippet. One-time purchase of the SKILL.md file itself (Agent Skills format), not an API call: $0.01 USDC, …

D1 Migration Writer: SQLite Migrations That Apply — Writes a SQL migration for Cloudflare D1 or SQLite from the current schema and the change wanted, so it applies on the first try and leaves the rows already in the database right. Knows what D1 refuses or breaks on, measured on a real D1 database - BEGIN and COMMIT in the file, foreign keys that cannot be switched off (a rebuild defers them, keeps the table name, and never closes with defer_foreign_keys = false, which on D1 silently skips the …

Env File Repair: Fix .env and INI Syntax, Keep Values — Repairs a broken .env file or INI file so the program that loads it reads every variable with the value its author meant, and answers with the file only, no code fence. Quotes a value that holds a hash sign or must keep its leading or trailing spaces, closes a quote that was left open, joins a key pasted over several lines, picks the quote style that keeps backslashes and mixed quotes intact, and leaves numbers such as 007 and 1.10, empty …

ICU Plural Messages (per-language CLDR categories) — Writes and fixes ICU MessageFormat strings for several locales at once, with exactly the plural categories each language uses (one, few, many, other and the rest), the mandatory other arm, exact-number arms such as =0, selectordinal, select, offset, nested messages and correct apostrophe quoting. Answers with a bare JSON map of locale code to message. Use when asked to write or translate a plural message, an ICU string, a count label such as …

JSON Diff Paths — Compares two pasted JSON documents, BEFORE and AFTER, and lists every value that differs as strict JSON, one entry per changed path, with the old and the new value. Paths are JSON Pointers, types are strict (the string "1" is not the number 1, null is not a missing key, an empty array is not an empty object), arrays are compared by index with no move detection, object key order and number spelling (1.0, 1e2) are not changes, and a document that is not valid JSON is refused, ne…

JSON Repair: Fix Broken JSON, Keep Every Value — Repairs broken JSON so a program can parse it, without changing any value. Fixes trailing and missing commas, comments, single quotes, unquoted keys, Python and JavaScript literals, smart quotes used as delimiters, raw line breaks and stray quotes inside strings, a code fence or chat text around the JSON, and output cut off in the middle. A value that was cut off becomes null instead of a guess, numbers JSON cannot hold as written are kept as str…