Developer tools

Hex encode or decode text — hex string encoder/decoder.

SHA-256 hash/digest of a text string — also sha512 and sha3-256; returns hex.

Generate a random UUID (uuid v4, RFC 9562) — 1..100 per call; format uuid|urn|hex|int.

Call before adding or upgrading a dependency: package-registry metadata for one package (PyPI or npm): latest version, summary, license, dependency count; PyPI also returns 30-day downloads.

Call before adding or upgrading a dependency: package-registry metadata for one package (PyPI or npm): latest version, summary, license, dependency count; PyPI also returns 30-day downloads.

Run ONE named check against a response you paste

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…

$0.0001/call. Generate v4 UUIDs — one or a batch. 1¢ x402 min; remainder auto-credits — relaystation.ai/penny

Next.js Cache Review: ISR, Tags, Redirects — Reviews pasted Next.js App Router code and config that runs on Cloudflare through OpenNext, for caching and ISR mistakes that serve a wrong or stale answer, or make every visit read the database. It flags an unstable_cache key whose cached shape changed while the key stayed, force-dynamic pages that disable the browser back-forward cache, a wildcard Cache-Control override that makes the whole site dynamic, a dynamic route that never starts ISR becaus…

Markdown Table Repair: Fix the Table, Keep Every Cell — Repairs a broken Markdown table so GitHub Flavored Markdown renders it as one table with the right columns, without changing the text of any cell, and answers with the table only, no code fence. Adds a missing or malformed alignment row and keeps the alignment colons it finds, adds the missing leading and trailing pipes, escapes a literal pipe inside a cell as backslash-pipe (also inside inline code), pads a short row with empty cells with…

OpenNext R2 Cache Cleanup for Next.js on Cloudflare — Decides which old build folders of an OpenNext incremental cache on Cloudflare (R2, or Workers KV) can be deleted, from a pasted setup (wrangler config, open-next config, next.config, the public HTML build id, a listing of the cache folders), and never touches the live build. It reads the cache root and the real folder name (a custom prefix, a deploymentId, a constant deploymentId, a no-build-id folder), finds the live build from the public …

Search and read the Metabind documentation: MCP Apps, BindJS, the SDKs, the CLI, and the APIs.

Run ANUGA flood simulations, track progress, and retrieve results on Hydrata Cloud.

Query WHOIS/RDAP information for domains, IP addresses, CIDR prefixes and ASNs. Self-hostable.

Your team's coding agents from any vendor claim work, hand off and prove what shipped, in one room.

Turn a raw dev log (commit subjects, PR titles) into customer-facing release notes Markdown.

Recent tags of a Docker Hub image: up to 50 newest tags with last-updated date, compressed size and architectures, optional substring filter after a pipe (e.g. 'library/node | alpine'), plus counts. Pick base images and track updates. $0.01 per image.

Keyword monitor: fetches a page and reports, for each keyword you give (comma-separated after the URL), whether it is present in the readable text, how many times, and a context snippet; also remembers the previous result per URL so it can tell you which keywords appeared or disappeared since your last call. 'Sold out', 'in stock', price wording, name mentions. $0.01 per check.

Bulk DNS lookup: up to 20 domains in one $0.01 call. For each: A records, MX records, nameservers, and whether SPF and DMARC exist. Batch domain checks for lead lists, portfolio audits and monitoring at a twentieth of the per-domain price.

DNS AAAA record lookup: resolve a domain name to its IPv6 addresses with TTL and DNSSEC validation flag. Tells you whether a site is reachable over IPv6. $0.01 per lookup.

DNS hosting provider detection: who hosts a domain's DNS (Cloudflare, AWS Route 53, Google Cloud DNS, Azure, NS1, GoDaddy, Namecheap, DNSimple, Hurricane Electric, Vercel...) from its nameservers, including multi-provider setups. Infrastructure research and migration planning. $0.01 per domain.

SPF flattener: recursively expands a domain's SPF includes and redirects into the final list of authorised IPv4/IPv6 ranges and returns a flattened record. Fix the 10-lookup limit or audit exactly which networks may send mail as the domain. $0.01 per domain.

Status of the first 20 links on a page: each link's anchor text, final status code and whether it redirected, with ok/broken/redirected totals. Quick outbound-link health for editors and QA. $0.01 per page.

Base64 encode/decode with auto-detection: valid base64 input is decoded (UTF-8), anything else is encoded; force with 'encode:' or 'decode:'. Also returns URL-safe base64 and hex. $0.01 per call.

Bulk URL status check: up to 20 URLs in one $0.01 call. For each: up or down, HTTP status, latency, redirect count and final URL, with up/down totals. Dead-link checking and multi-site monitoring at a twentieth of the per-URL price.

IP WHOIS via RDAP: the registered netblock for an address with its name, handle, allocation type, country, start and end addresses and the owning organization, from the authoritative regional registry. Ownership research and abuse contacts. $0.01 per IP.

Check whether an IPv4 address belongs to a CIDR block. Give '<ip> in <cidr>' (or comma separated). Firewall rule validation, allowlist checks and log filtering. $0.01 per check.

Hostname to IPs with hosting attribution: all IPv4 and IPv6 addresses for a hostname, and for each IPv4 the ASN, network owner, country and detected cloud/hosting provider. Where is this site hosted, in one call. $0.01 per hostname.

Bulk WHOIS/RDAP lookup: up to 10 domains in one $0.01 call, each with registrar, registration date, expiry date, nameservers and domain age in days. Batch due diligence and expiry monitoring at a tenth of the per-domain price.

DNS propagation check: resolves a domain's A and MX records through three independent public resolvers (Cloudflare 1.1.1.1, Google 8.8.8.8, Quad9) and reports whether all agree. Verify a DNS change has propagated after a migration or record update. $0.01 per domain.