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Regex Replace
x402
Regex Replace is a paid API for AI agents from x402.agentindex.world, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-16).
Replaces regular expression pattern matches in a given text string, with an optional maximum replacement count.
Price / call$0.001
Success—
StatusUnknown
How this service works
Replace regular expression matches in text, with an optional max-replacement count.
Output
Returns the input text with all (or up to count) regex pattern matches replaced by the specified replacement string. The result is the modified text string after substitution.
Example use cases
Redact SSNs from log output
“In this server log, replace all Social Security Number patterns matching \d{3}-\d{2}-\d{4} with [REDACTED]: 'User 123-45-6789 logged in, backup user 987-65-4321 also active.'”
Normalize extra whitespace in user input
“Take this user-submitted text and replace any sequence of two or more whitespace characters with a single space: 'Hello world, this is a test.'”
Swap template placeholders with values
“In my email draft, replace the pattern \{\{name\}\} with 'Sarah' — only replace the first occurrence: 'Dear {{name}}, thank you {{name}} for your order.'”
Technical details
Endpoint
GEThttps://x402.agentindex.world/regex/replace?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, pay-per-call regex find-and-replace on text without setting up a server-side script or runtime environment. Ideal for agents that need lightweight, stateless string transformation — especially when the pattern is dynamic and cannot be hardcoded. Prefer this over general-purpose LLM text editing when you need deterministic, pattern-exact substitution behavior.
Side effects
- Invalid regex pattern causes a parse/compile error response
- Text or pattern fields missing results in a validation error
- Extremely long text or complex patterns may time out
- Malformed JSON input returns a 400 bad request
- count parameter of 0 is treated as unlimited replacements (default behavior)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| text | string | |
| count | integer | |
| pattern | string | |
| replacement | string |
Output
Schema · Response
{
"type": "json",
"example": {
"result": "too many spaces",
"replacements": 2
}
}Tags
x402
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