# modal.Probe | Modal Docs

- **URL:** https://modal.com/docs/sdk/py/latest/modal.Probe
- **Summary:** Probe configuration for the Sandbox Readiness Probe.

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modal.Probe
===========

    class Probe(object)

Probe configuration for the Sandbox Readiness Probe.

**Usage**

    # Wait until a file exists.
    readiness_probe = modal.Probe.with_exec(
        "sh", "-c", "test -f /tmp/ready",
    )
    
    # Wait until a TCP port is accepting connections.
    readiness_probe = modal.Probe.with_tcp(8080)
    
    app = modal.App.lookup('sandbox-readiness-probe', create_if_missing=True)
    sandbox = modal.Sandbox.create(
        "python3", "-m", "http.server", "8080",
        readiness_probe=readiness_probe,
        app=app,
    )
    sandbox.wait_until_ready()

    __init__(self, tcp_port=None, exec_argv=None, interval_ms=100)

with_tcp 

    with_tcp(cls, port, *, interval_ms=100)

with_exec 

    with_exec(cls, *argv, interval_ms=100)

[modal.Probe](https://modal.com/docs/sdk/py/latest/modal.Probe#modalprobe)
[with_tcp](https://modal.com/docs/sdk/py/latest/modal.Probe#with_tcp)
[with_exec](https://modal.com/docs/sdk/py/latest/modal.Probe#with_exec)