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ONE Engine Array Join
x402
ONE Engine Array Join is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-02).
Joins an array of values into a single string using a specified separator character.
Price / call$0.001
Success—
StatusUnknown
How this service works
Low-cost pay-per-call utility APIs for autonomous agents using x402 on Base.
Output
Returns a JSON object with a `text` field containing all array values concatenated together using the specified separator string, e.g. {"text": "apple, banana, cherry"}.
Example use cases
CSV row construction from data array
“I have an array of column values — ["Alice", "30", "Engineer", "New York"] — can you join them with a comma so I can write a CSV row?”
Human-readable list formatting
“Turn this list of tags ["javascript", "react", "typescript"] into a single string separated by " | " so I can display it on a profile card.”
Natural language sentence assembly
“I have the words ["The", "quick", "brown", "fox"] — join them with a space so I can use the result as a sentence in my document.”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v1/array/join?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs a cheap, fast, pay-per-call string join operation without spinning up a compute environment or writing inline code. Ideal for autonomous agent pipelines on Base using x402 micropayments that need to format arrays as delimited strings for downstream processing, display, or CSV generation.
Side effects
- Missing or empty `values` array may return an empty string or error
- Non-string values in the array may be coerced or cause unexpected output
- Missing `separator` field may default to empty string or return an error
- Payment failure via x402 will prevent the call from completing
- Malformed JSON request body will result in a 4xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| values | array | |
| separator | string |
Output
Schema · Response
{
"type": "json",
"example": {
"text": "ONE Engine"
}
}Tags
x402
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