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fastapi.online — Code Translation (Cross-Language Code Converter)
x402
fastapi.online — Code Translation (Cross-Language Code Converter) is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Translates source code from one programming language to another using AI inference, preserving logic and structure.
Price / call$0.002
Success—
StatusUnknown
How this service works
Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding & crypto utilities, date/time calculators, geo/coordinate math, math & finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.
Output
Returns the translated source code in the target programming language, preserving the logic and structure of the original code.
Example use cases
Porting Python ML script to JavaScript
“I have this Python data-processing script I need converted to JavaScript — can you translate it for me? Here's the code: `import numpy as np\nresult = np.mean([1,2,3,4,5])`”
Converting Bash automation to Python
“Can you take this Bash script and rewrite it in Python? The script is: `#!/bin/bash\nfor f in *.txt; do echo $f; done`”
Migrating legacy Java to Go
“I need this Java class ported to Go — translate it from Java to Go: `public class Greeter { public String greet(String name) { return "Hello, " + name; } }`”
Technical details
Endpoint
POSThttps://api.fastapi.online/code-translateWhen to prefer
Choose this endpoint when you need a quick, pay-per-call code translation without signing up for a full service. Ideal for one-off conversions or agent workflows that need to port code snippets between languages programmatically. At $0.002 per call it is cost-effective for high-volume automated translation pipelines.
Side effects
- Unsupported language pair may produce poor or garbled output
- Code exceeding 20,000 characters will be rejected
- Ambiguous or missing from_language may cause incorrect translation
- Complex language-specific constructs (e.g. macros, metaprogramming) may not translate accurately
- Payment failure or missing credentials returns a 402 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| code | string | |
| to_language | string | |
| from_language | string |
Tags
x402
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