125 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.
Validate a currency amount: tests the value against a well-known currency amount pattern and returns valid true/false, the pattern used (so you can reuse it), and, when it fails, the first character position that breaks...
Pretty-print, validate or format a JSON payload and return parse errors with their position. Use to check a JSON string or make it readable.
JSON validator and formatter: parses the text, reports the error with position if invalid, otherwise returns pretty-printed and minified versions, the top-level type, key count, depth and size. Fix agent-generated JSON f...
Postal / ZIP code format check: the expected pattern and an example for 30 countries, and whether a given code matches it. Address validation without an address API. $0.01 per check.
IPv6 prefix 64: pure calculation on the address, no network call. The /64 network. $0.01 per call.