Dev Toolkit

Developer utilities — hashing, unit conversion, timezone math, expressions, DNS lookups, text transforms, geocoding.

Seven developer utility APIs accessible through one skill. When you need to hash, convert, calculate, look up, or transform — dispatch to the right tool.

When to Activate

Use this skill when you need to:

• Hash or encode data (SHA-256, HMAC, base64, hex, UUID generation)
• Convert units — currencies with live rates, physical units (80+ across 8 categories), or encodings
• Do timezone math — current time anywhere, convert between zones, date arithmetic, epoch conversion
• Evaluate expressions — safe math with variables, statistics, percentage calculations
• Look up DNS — A/MX/TXT records, reverse DNS, WHOIS, IP geolocation
• Transform text — slugify, regex, diff, markdown/HTML conversion, JSON manipulation
• Geocode — address to coordinates, coordinates to address, great-circle distance

Tool Dispatch

Match the task to the right service:

Need	Service	Endpoint
SHA-256 hash of a string	hash.agentutil.net	POST /v1/hash
HMAC signature	hash.agentutil.net	POST /v1/hmac
Base64/hex encode/decode	hash.agentutil.net	POST /v1/encode
Generate UUID	hash.agentutil.net	POST /v1/encode {format: "uuid"}
Identify unknown hash	hash.agentutil.net	POST /v1/identify
Currency conversion (live rates)	convert.agentutil.net	POST /v1/currency
Unit conversion (km, lbs, etc.)	convert.agentutil.net	POST /v1/units
Encoding conversion	convert.agentutil.net	POST /v1/encoding
Current time in timezone	time.agentutil.net	POST /v1/now
Convert between timezones	time.agentutil.net	POST /v1/convert
Add/subtract from date	time.agentutil.net	POST /v1/math
Unix epoch conversion	time.agentutil.net	POST /v1/epoch
Evaluate math expression	math.agentutil.net	POST /v1/evaluate
Descriptive statistics	math.agentutil.net	POST /v1/statistics
Percentage calculation	math.agentutil.net	POST /v1/percentage
DNS records (A, MX, TXT...)	dns.agentutil.net	POST /v1/lookup
Reverse DNS	dns.agentutil.net	POST /v1/reverse
WHOIS/RDAP	dns.agentutil.net	POST /v1/whois
IP geolocation	dns.agentutil.net	POST /v1/geoip
Text transform (slugify, case)	text.agentutil.net	POST /v1/transform
Regex match/replace	text.agentutil.net	POST /v1/regex
Line-level diff	text.agentutil.net	POST /v1/diff
Markdown/HTML conversion	text.agentutil.net	POST /v1/convert
JSON format/validate/query	text.agentutil.net	POST /v1/json
Address to coordinates	geocode.agentutil.net	POST /v1/forward
Coordinates to address	geocode.agentutil.net	POST /v1/reverse
Distance between points	geocode.agentutil.net	POST /v1/distance

Quick Examples

Hash a string:

bash

curl -X POST https://hash.agentutil.net/v1/hash \
  -H "Content-Type: application/json" \
  -d '{"input": "hello world", "algorithm": "sha256"}'

Convert currency:

bash

curl -X POST https://convert.agentutil.net/v1/currency \
  -H "Content-Type: application/json" \
  -d '{"value": 100, "from": "USD", "to": "EUR"}'

What time is it in Tokyo?

bash

curl -X POST https://time.agentutil.net/v1/now \
  -H "Content-Type: application/json" \
  -d '{"timezone": "Asia/Tokyo"}'

Evaluate expression with variables:

bash

curl -X POST https://math.agentutil.net/v1/evaluate \
  -H "Content-Type: application/json" \
  -d '{"expression": "price * quantity * (1 - discount)", "variables": {"price": 49.99, "quantity": 3, "discount": 0.1}}'

DNS MX records:

bash

curl -X POST https://dns.agentutil.net/v1/lookup \
  -H "Content-Type: application/json" \
  -d '{"domain": "example.com", "type": "MX"}'

Slugify text:

bash

curl -X POST https://text.agentutil.net/v1/transform \
  -H "Content-Type: application/json" \
  -d '{"input": "Hello World! This is a title.", "operations": ["slugify"]}'

Distance between cities:

bash

curl -X POST https://geocode.agentutil.net/v1/distance \
  -H "Content-Type: application/json" \
  -d '{"from": {"address": "London, UK"}, "to": {"address": "Tokyo, Japan"}, "unit": "km"}'

Data Handling

These services process the input you send and return results immediately. No data is stored or logged beyond the response. Be cautious about sending sensitive data (passwords, private keys, private addresses) — ask the user first. Text transforms on user-generated documents should only be done with the user's explicit request.

Pricing

All seven services: 10 free queries/day each, then $0.001/query via x402 (USDC on Base). No authentication required for free tier.

Privacy

Stateless processing — no data retention. No personal data collected. Rate limiting uses IP hashing only.