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BlockRun.AI Sandbox Exec
x402
BlockRun.AI Sandbox Exec is a paid API for AI agents from blockrun.ai, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-13, last successful call 2026-07-22).
Execute a shell command inside an isolated sandbox environment and return stdout, stderr, and exit code.
Price / call$0.003
Success100%
StatusUnknown
How this service works
Execute command in sandbox, returns stdout/stderr/exit code.
Output
Returns the standard output (stdout), standard error (stderr), and integer exit code produced by the executed command within the sandbox environment.
Example use cases
Example prompt
“Run `python -c "import math; print(math.sqrt(144))"` inside my existing sandbox (ID: sb_abc123) with a 30-second timeout and give me the stdout, stderr, and exit code.”
Technical details
Endpoint
POSThttps://blockrun.ai/api/v1/modal/sandbox/execWhen to prefer
Choose this endpoint when you need to execute arbitrary shell or scripting commands in a secure, isolated environment and capture their output. Ideal for running Python snippets, shell scripts, or build commands without local environment access. Requires a sandbox to be pre-created via /sandbox/create.
Side effects
- Sandbox ID not found or expired — returns error indicating invalid sandbox_id
- Command times out beyond specified or maximum 60-second limit — returns non-zero exit code or timeout error
- Invalid command array format — returns 400 bad request
- Sandbox resource limits exceeded — execution may fail with a non-zero exit code or infrastructure error
- Payment not authorized — returns 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| command | array | Command to execute, e.g. ["python", "-c", "print(1)"] |
| timeout | number | Execution timeout in seconds (max 60, default: 60) |
| sandbox_id | string | Sandbox ID from /sandbox/create |
Tags
x402
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