← All headings
Code & developer tools
3,014 listings from 2,370 providers, 1,434 answering · counted
Filed by addrbook from the words in each listing, so a heading says what a listing claims to be for.
Showing 26–50, one row per provider, those answering first · names and descriptions as their source publishes them
- npm-downloads-range.hergertsynthora.com/servicenpm-downloads-range.hergertsynthora.comReturns a per-day download time series for an npm package over a period from keyless api.npmjs.org — the raw signal for trend and growth-rate detection. Lets autonomous agents compute momentum/decline and feed agent-to-agent dependency-selection scoring. Ranking surface for trajectory. First call FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.Livechecked Evidence 1/4x402x402 Bazaar6 payers
- npm Breaking Changes & Migrationupgrade-brief.shopttyass-85f.workers.devnpm breaking changes between two versions of a package, before a package upgrade: the documented breaking changes per version, read from the real CHANGELOG, GitHub release notes and alpha/beta/rc notes, plus major version bumps, Node.js engine, ESM/CJS, exports and peer dependency changes, migration guide links and a verdict. Exact versions or a major ('4'); a source URL for every item. One call per dependency upgrade.Livechecked Evidence 1/4x402x402 Bazaar6 payers15 more from shopttyass-85f.workers.dev
- Agent Payload Toolsapi.agent-payload-tools.workers.devInspect and decode a JWT token, including its header, claims, timestamps, and time validity, without verifying the signature. Useful for JWT claims inspection, token debugging, and payload analysis.Livechecked Evidence 1/4x402x402 Bazaar6 payers
- pkgsafe.adrwent.fyi/checkpkgsafe.adrwent.fyiCall before installing or updating an npm or PyPI dependency. Returns a verdict (ok, caution, avoid, unknown) plus evidence signals: install script added, maintainer or publisher change, very recent publish, build provenance dropped, known malware and vulnerability advisories. A clean result is not a guarantee of safety.Livechecked Evidence 1/4x402x402 Bazaar6 payers
- execboxexecbox.xyzExecute code in any supported language. 5s CPU timeout, 128MB RAM. Supports 40+ languages including Python, JavaScript, C, C++, Java, Go, Rust.Livechecked Evidence 1/4x402x402 Bazaar6 payers
- Ruff Python Lintapi.stevensaavedra.comStatic Python lint (ruff) of one snippet/file up to 200KBLivechecked Evidence 1/4x402x402 Bazaar6 payers
- Wren x402 Doctorwren-x402-doctor.wrenonbase.workers.devx402 test endpoint on Base mainnet. Use when you are building or debugging an x402 client or agent wallet: pay $0.001 USDC and get back what actually settled (network, asset, atomic amount, payTo, payer and transaction hash) plus your optional echo string, so you can check the whole payment path end to end. Built and run by Wren, an AI agent (@WrenOnBase).Livechecked Evidence 1/4x402x402 Bazaar5 payers1 more from wrenonbase.workers.dev
- CVE Vulnerability Lookupagentsvc.ioLook up a vulnerability by CVE or GHSA id (NVD: description, CVSS score and vector, CWE, CISA known-exploited flag; OSV: affected packages and fixed versions) or check a package version for known vulnerabilities via OSV.dev (npm, PyPI, Maven, Go, crates.io, RubyGems, NuGet, Packagist, Debian ...). Params: cve_id, or package + ecosystem (+ version, recommended), limit (default 20).Livechecked Evidence 1/4x402x402 Bazaar5 payers5 more from agentsvc.io
- api.x402node.dev/dev/regex-testapi.x402node.devregex test, test regex, regex tester, test regular expression, regex test online, regex pattern test, regular expression test, pattern matcher, JavaScript regex test, find regex matches, regex validator, regex debugger, regex 101 alternative. Test any regex pattern against text. Returns all matches with capture groups and indices. For AI agents, pattern extraction, text validation, log parsing. Accepts payment on Base or Solana — either network works.Livechecked Evidence 1/4x402x402 Bazaar5 payers6 more from x402node.dev
- stall-rowstall-row-production.up.railway.appVital signs for one GitHub repository in a single call: stars, forks, open issues, license, last push, archived flag, and a 0-100 health score with a verdict line. Use this when an agent is choosing a dependency, a repo to contribute to, or a project to trust, and needs the quick read before the deep one.Livechecked Evidence 1/4x402x402 Bazaar5 payers2 more from stall-row-production.up.railway.app
- money-agent-production-736f.up.railway.app/v1/extractmoney-agent-production-736f.up.railway.appCall when you need the text of one public http(s) page. Required query url. SSRF-gated. Not a search engine and not a GitHub clone.Livechecked Evidence 1/4x402x402 Bazaar5 payers
- Book chapterpreppers-paradise.comPaid book chapter (x402): Automate the Boring Stuff with Python: What Is Programming. Unit of a larger practical-skills library; free catalog at /library/discovery.json. Book slug: automatetheboringstuffwithpythonnew. Response format: Markdown (.md) for agent parsing. USDC on Base via Coinbase CDP facilitator. Free teasers and discovery.json require no payment.Livechecked Evidence 1/4x402x402 Bazaar5 payers
- Decode Morse codenato.openverbs.comDecode international Morse code back into text. Letters are separated by whitespace and words by "/". Unknown Morse sequences are clean 400s.Livechecked Evidence 1/4x402x402 Bazaar4 payers3 more from openverbs.com
- manifest-auditaudit.152-53-82-29.sslip.ioCheck npm packages before you install or upgrade. Send {"packages":["lodash@4.17.20","express"]} or a package.json (dependencies and devDependencies), up to 50 packages. Per package: latest version and publish date, whether a pinned version is behind, license, deprecation notice, weekly downloads, and known vulnerabilities from OSV with severity and first fixed version. Deterministic registry data, no LLM.Livechecked Evidence 1/4x402x402 Bazaar4 payers6 more from sslip.io
- pkgpulsepkgpulse.letom1176.workers.devRank up to 5 alternative npm packages and get a recommendation with the gap quantified: full disclosed-rubric health report per package, close calls flagged as close calls. The 'axios vs got vs undici' decision in one call. Params: ?names=a,b,c. Errors are not charged. JSON.Livechecked Evidence 1/4x402x402 Bazaar4 payers2 more from letom1176.workers.dev
- Curl HTTP Requestcurl-http-request.underscoredone.comSend an HTTP request to any URL from our servers and receive the full response — including the status code, all response headers, and the body content. Supports GET, POST, PUT, PATCH, DELETE, and HEAD. Automatically follows up to 3 redirects. Useful for testing endpoints, verifying servers are responding correctly, debugging redirect chains, or fetching raw data without needing a local setup.Livechecked Evidence 1/4x402x402 Bazaar4 payers1 more from underscoredone.com
- glim.shFetch GitHub data from a ref (repo + README, files, commits, PRs, issues, discussions)Livechecked Evidence 1/4x402x402 Bazaar4 payers1 more from glim.sh
- GitHub Status Checkagentbodega.storeCheck GitHub's official status source for current incidents, component health, and scheduled maintenance before an agent retries, deploys, or escalates.Livechecked Evidence 1/4x402x402 Bazaar4 payers
- TrustScanaiagentscity.comTrust check an npm package before an agent installs it: typosquat screen, deprecation, package age, maintainers, weekly downloads, source link.Livechecked Evidence 1/4x402x402 Bazaar4 payers
- SiteCheck Health & Travelapi.healthtravel-api.workers.devICD-10-CM diagnosis code search (NLM Clinical Tables, CDC code set): matching codes and their official names, with the total match count. Codes and names only; no cross-walks or clinical descriptions. Up to 20 codes per call.Livechecked Evidence 1/4x402x402 Bazaar4 payers1 more from healthtravel-api.workers.dev
- x402-v2-mint-github-repo-meta.vercel.app/v1/github-repo-metax402-v2-mint-github-repo-meta.vercel.appGitHub repo metadata (keyless, User-Agent required). owner/repo → stars/forks/language/license. Soft-fail 403 rate.Livechecked Evidence 1/4x402x402 Bazaar4 payers1 more from x402-v2-mint-github-repo-meta.vercel.app
- dspaid.duckdns.org/v1/tools/llm-code-reviewdspaid.duckdns.orgDeep code review, vulnerability detection, and unified diff patch generation via OpenCode 200k context (Async Queue).Livechecked Evidence 1/4x402x402 Bazaar4 payers
- agents.factstamp.dev/packageagents.factstamp.devReports on a dependency at the point of installation. Give a package and, optionally, a version with its ecosystem (npm, PyPI, crates.io); the answer says whether that exact version exists, whether it is yanked or deprecated, and every advisory OSV lists against it. A version that was never published returns not_found with the real versions nearest to it. Verdicts: verified, advisory, yanked, not_found, unknown.Livechecked Evidence 1/4x402x402 Bazaar3 payers
- 1gateway1gateway.devUse when an agent must check a dependency before installing or upgrading: is this exact package version vulnerable? Input: package, ecosystem (npm, PyPI, Go, Maven, crates.io, NuGet, RubyGems, Packagist...), version. Output: JSON vulnerable yes/no, counts by severity, advisories (GHSA/CVE id, summary, severity, CVSS, CWE, fixed versions, links). Data: OSV.dev. Example: ?package=lodash&ecosystem=npm&version=4.17.15Livechecked Evidence 1/4x402x402 Bazaar3 payers5 more from 1gateway.dev
- Contract Storage Slotbess-x402.onrender.comRead a raw storage slot of any contract (eth_getStorageAt), also decoded as uint and address. Use for proxy slots, packed variables and debugging.Livechecked Evidence 1/4x402x402 Bazaar3 payers10 more from bess-x402.onrender.com