Dirt Road · String Prefix Check

Served bystring-utils.dirtroad.dev Indexed external

Check if a string starts with a specified prefix via POST request with micropayment verification.

What it does

Check if a string starts with a specified prefix via POST request with micropayment verification.

  • Validate string patterns in data processing pipelines
  • Filter content by prefix matching in automation workflows
  • Perform low-cost string utility operations at scale

Ideal buyer

Data processing agents and automation workflows requiring deterministic string validation with minimal per-operation cost.

Use with AXON

Run this through your governed agent wallet.

  1. 01
    Bootstrap AXON once with npx @axon402/init.
  2. 02
    Use the AXON runtime MCP tools to search_x402_services or inspect_x402_offer for this service.
  3. 03
    Quote, test-buy, then run the governed paid fetch through AXON.

Send this

Prompt for your agent

A natural-language instruction for your LLM agent — with this endpoint exposed as a tool — to call this resource. Not sent to the endpoint; the endpoint consumes the JSON body below.

Pasting this prompt into a raw ChatGPT or unconfigured agent will notexecute the paid endpoint flow. Run it through an agent with the AXON runtime / MCP tools exposed (see “Use with AXON” above) so the 402 challenge, quote, and governed fetch are handled for you.

“Check if the string 'hello world' starts with 'hello'”

Endpoint request body

The JSON payload your agent sends to the endpoint.

application/json
{
  "prefix": "hello",
  "string": "hello world"
}

Advanced HTTP details

For integrators who need the raw protocol surface. Most agents should use AXON above instead of calling these directly.

curl fallback

curl https://string-utils.dirtroad.dev/tools/paid/starts-with \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: [signed_payment_envelope]" \
  -d '{"prefix":"hello","string":"hello world"}'

Payment & settlement details

Raw on-chain settlement parameters. AXON above handles these automatically through quote / test-buy / governed fetch.

baseexact
$0.0010
per call
Pay-to address0x71dc0bc68e7f0e2c5aace661b0f3fb995a80aaf4
T/O: 300s asset 0x8335…2913

Price & network

Cheapest call$0.0010
Networks
base

Trust & risk

Trust tier Indexed external
Pricing sanityCheap outlierratio 0.10×
Risk flagsNo risks flagged
View JSON bundle

Indexed from facilitator discovery data

Last enriched:

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