# Tctl: passing json proto parameters as input to start workflow
**URL:** https://community.temporal.io/t/tctl-passing-json-proto-parameters-as-input-to-start-workflow/12502
**Category:** Community Support
**Tags:** tctl
**Created:** [June 14, 2024, 4:38pm UTC](https://community.temporal.io/t/tctl-passing-json-proto-parameters-as-input-to-start-workflow/12502 "2024-06-14T16:38:16Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@dstolyarov](https://community.temporal.io/u/dstolyarov)
#### Post date: [June 14, 2024, 4:38pm UTC](https://community.temporal.io/t/tctl-passing-json-proto-parameters-as-input-to-start-workflow/12502/1 "2024-06-14T16:38:16Z")
Trying to trigger a workflow run with tctl and a proto json parameter but it looks like the payload comes as json/plain and fails to unmarshal on starting the workflow
Is it possible to pass other kinds of parameters?
Specifically interested in json/proto
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### Author:  [@bergundy](https://community.temporal.io/u/bergundy)
#### Post date: [June 17, 2024, 12:51pm UTC](https://community.temporal.io/t/tctl-passing-json-proto-parameters-as-input-to-start-workflow/12502/2 "2024-06-17T12:51:15Z")
This is supported in the newer temporal CLI: [GitHub - temporalio/cli: Command-line interface for running Temporal Server and interacting with Workflows, Activities, Namespaces, and other parts of Temporal](https://github.com/temporalio/cli)
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### Author:  [@dstolyarov](https://community.temporal.io/u/dstolyarov)
#### Post date: [June 17, 2024, 2:24pm UTC](https://community.temporal.io/t/tctl-passing-json-proto-parameters-as-input-to-start-workflow/12502/3 "2024-06-17T14:24:27Z")
Nice, thanks. What is the difference between tctl and temporal client?