Development x402 offerings

llms.txt Writer — Writes an llms.txt file in the shape the llms.txt proposal defines, from a site description and a list of pages, answered as the Markdown file only. One H1 with the site name, a blockquote summary, optional plain notes, then H2 sections that hold lists of links in the form "- [name](address): notes". Every address is absolute (a relative one is joined to the stated origin) and copied exactly, never invented; pages marked noindex, private or behind a login are left out; a page …

MCP Tool Schema: Definitions from API Docs — Writes the MCP tool definition for one API operation - name, description, inputSchema and annotations - as the JSON a server returns from tools/list. The schema takes exactly the parameters the operation takes - required ones listed, defaults stated, exact enums, integer amounts, date formats, ranges, string and array limits, either-or parameters that refuse a call with both or neither - and refuses unknown ones. Credentials never become parameters, …

PO File Repair: Make msgfmt Accept It Again — Repairs a gettext .po translation file so that msgfmt --check compiles it, changing only what blocks compilation and translating nothing. Knows what the checker really rejects - an unescaped quote or a missing closing quote, an escape it does not know, a msgid that starts or ends with a newline while its msgstr does not, c-format or python-format placeholders that differ, the wrong number of plural forms, msgstr without an index on a plural entry or…

ReDoS Regex Rewrite: Same Answers, Linear Time — Rewrites a JavaScript regular expression that can hang on a crafted input (catastrophic backtracking, ReDoS) into one that gives exactly the same yes or no for every text and runs in linear time, answered as JSON with the pattern and flags. Knows the shapes that explode - a quantified group whose inside is quantified too, alternatives under a star that can match the same text, an optional separator between repeats, a counted group of runs, an una…

RSS Feed Builder — Writes an RSS 2.0 file, or an Atom one when asked, from a list of posts, answered as the XML only with no fence and no sentence around it. Dates are RFC 822 with a correct weekday, never ISO; a post with no date gets no date, a post with no image gets no image and a post with no summary gets no description, so nothing is invented. Ampersands are escaped, HTML summaries go in CDATA, every link is absolute, the guid never changes, and the Atom namespace with a self link is decl…

Sitemap Builder — Builds a correct XML sitemap, or a sitemap index file, from a list of pages, answered as the XML document only. Lists only canonical, indexable pages that return 200 on one host, and leaves out redirecting, noindex, non-canonical, removed and other-host addresses. Writes every address absolute and entity-escaped (an ampersand in a query string becomes the escape code), and writes lastmod only when the input gives a real date for that page - never the day the file was generated…

SKILL.md Review: Safe and Within the Limits — Reviews a SKILL.md file before you install, buy or publish it and lists every problem with a fixed code, the place and a fix, then gives one verdict. It checks the front matter against the published limits (name up to 64 characters in lowercase, hyphens and digits, no reserved words; description present, up to 1,024 characters, naming both its job and the requests that should trigger it, in the third person), and it reads the body for hidden orders …

Spreadsheet Formula: Excel and Google Sheets — Writes one spreadsheet formula for Excel or Google Sheets from a plain description and a sample of the sheet, using the sheet's real cell addresses and ready to be copied down. It fixes the ranges that must not move, looks values up by exact match, reads thresholds the way they are worded, builds dates with DATE, keeps blank cells apart from zeros, and uses functions that work in both Excel 2019 or later and Google Sheets. It answers with the formu…

SQL Dump to SQLite: MySQL and Postgres Rows, Unchanged — Converts a MySQL or PostgreSQL dump (CREATE TABLE, INSERT rows, COPY blocks) into SQL that SQLite, Cloudflare D1 and Turso execute, with every value in every row unchanged, and answers with the SQL only, no code fence. Decodes string escapes the right way for each source (MySQL backslash sequences, Postgres E strings and dollar quotes, COPY escapes with its null marker), keeps strings that look like numbers as strings, turns booleans into…

Test Review: Can This Test Ever Fail? — Reviews a pasted test, check script, smoke test, mutation script or CI step and says whether it can fail when the thing it guards is broken, so a green result is worth something. It finds a completeness guard that counts its own hard-coded list instead of the directory, a one-star glob that never enters subfolders, a mutation script that restores with git checkout and wipes the uncommitted fix under test, a null test that an empty string passes, a status …

Tests from Spec: Cases from the Requirements — Writes test cases for a function from its specification rather than from its code, as a JSON table that any test runner can loop over. Every rule, boundary and error the spec defines gets a case, and every expected value is worked out from the spec; where the code you show disagrees with the spec, the case follows the spec and a note says where. Behaviour the spec leaves open becomes a question instead of a guessed case. Use to write unit tests fro…

TOML Repair: Fix Broken TOML, Keep Every Value — Repairs TOML 1.0 that does not parse (pyproject, Cargo manifests, Worker config files, tool settings) without changing any value's text or type, and answers with the TOML only, no code fence. Fixes unquoted strings, keys with spaces, a missing equals sign, an unclosed quote, bracket or table header, backslashes in Windows paths, numbers with leading zeros, decimal commas, slash dates, a multi-line inline table, and chat text or a fence around the…

Translate App Text (JSON, YAML, PO) — Translates app strings and locale files (JSON, YAML, gettext PO, ICU messages, HTML snippets) into another language without breaking them. Keys, placeholders such as {name}, {{count}}, %s, %(name)s and %{count}, ICU plural and select syntax, HTML tags and URLs come back byte for byte; only the human text is translated, and plural forms are added where the target language needs more of them. Use when asked to translate a JSON or YAML locale file, an en.json,…

Translate Markdown: Docs That Still Build — Translates a Markdown, MDX or HTML document (docs page, README, blog post, help article) into another language and returns the whole document with only the human text changed. Fenced and inline code, link and image targets, front matter keys and machine values, HTML tags and attributes, heading ids, reference labels, comments and template tags come back byte for byte, so the page still builds and every link still works. Alt text, titles and link text …

Unified Diff Repair: Fix the Counts, Keep the Change — Repairs a unified diff (the patch format of git diff and diff -u) so that git apply and patch accept it against the file it was written for, and answers with the diff only, no code fence. Recounts the numbers in each hunk header from the hunk's own lines, puts back context lines and removed lines exactly as the file has them (tabs, trailing spaces, blank lines, carriage returns), adds the backslash line that marks a missing final line break…

x402 Seller: Get Paid and Listed in Bazaar — Diagnoses why an HTTP API sold over x402 v2 cannot be paid by standard buyer agents or never appears in the Coinbase CDP Bazaar catalog, using an ordered checklist and a decision tree over the pasted 402 response, headers and symptoms. Names the exact field that is wrong or missing and how to prove the fix. Use when asked to check an x402 seller, fix an unpayable 402 endpoint, find out why a resource is not listed in Bazaar, or why a settled payment …

XML Repair: Fix Broken XML, Change No Text — Repairs broken XML so a standard parser accepts it, without changing a single text node, attribute value, comment or CDATA section, and answers with the XML only, no code fence. Fixes a raw ampersand or less-than sign in text or in an attribute value, an HTML entity name such as nbsp that plain XML does not define, an attribute value without quotes, an end tag that is missing in one place only, a declaration that is not the first thing in the file, a…

YAML Repair: Fix Broken YAML, Keep Every Value — Repairs broken YAML and Markdown front matter so a program can parse it, without changing any value's text or type, and answers with the YAML only, no code fence. Fixes tabs used as indentation, indentation that fits no parent, a missing closing quote or bracket, values that need quotes (a colon inside, a leading star or at sign), and output cut off in the middle, where the cut value is kept as cut and never completed. Yes, no, on, off and NO sta…

Text embeddings on Venice models for retrieval, RAG, and semantic search, paid per request in USDC on Base via x402, no API key. Resolve a model id from GET /api/v1/models?type=embedding.

Android Strings Translate: strings.xml That Still Builds — Translates an Android string resource file (res/values/strings.xml) into another language and returns the whole XML file, so the Android build and the app accept it. Only the text between the tags changes. Resource names, attributes, comments, placeholders such as %1$s, %d and %%, the escapes backslash-apostrophe, backslash-quote, backslash-n and backslash-at, the quoted form for leading or trailing spaces, inline markup, CDATA sections…

One call for all of an agent's dependencies: npm, PyPI, crates.io and Go packages (new publishers, install scripts, license changes), public API contracts (breaking changes), AI models (retirement dates, price changes), MCP servers (tool changes, uptime) and x402 services (wallet and price changes, flags), for the last 1 to 30 days, with what needs attention first. Signed.

Dated contract changes in widely used public APIs (Stripe, GitHub, OpenAI, Twilio, Slack, Plaid, Datadog and more), from their published OpenAPI descriptions read daily: operations, parameters and request fields added, removed or newly required, each change marked breaking or not. Last 1 to 90 days, one API with api=, or only breaking changes with breaking=true. Signed.

AI model prices per million tokens (input, output, cache, batch) with context window, for about 4,000 models across providers. With model=: its price history and the same model on other providers. Without: a list filtered by provider, mode, min_context and max_input price, sorted by input, output or context. History from January 2026. Source: LiteLLM's open price file (MIT). Signed.

One watched public API's contract record: current version, operation count and keys, deprecated operations, security schemes, and every dated change in the last 90 days with what broke. From the provider's published OpenAPI description, read daily. Without name=, lists the APIs we watch. Signed.