WhatsApp Flow Management

When to use

Use this skill to manage WhatsApp Flows end-to-end: discover flows, edit flow JSON via versions, publish/test, attach data endpoints, and inspect responses/logs.

Setup

Env vars:

• KAPSO_API_BASE_URL (host only, no /platform/v1)
• KAPSO_API_KEY
• META_GRAPH_VERSION (optional, default v24.0)

Run scripts with Node or Bun:

node scripts/list-flows.js

How to

Create and publish a flow

1. Create flow: node scripts/create-flow.js --phone-number-id <id> --name <name>
2. Read references/whatsapp-flows-spec.md for Flow JSON rules
3. Update JSON: node scripts/update-flow-json.js --flow-id <id> --json-file <path>
4. Publish: node scripts/publish-flow.js --flow-id <id>
5. Test: node scripts/send-test-flow.js --phone-number-id <id> --flow-id <id> --to <phone>

Attach a data endpoint (dynamic flows)

1. Set up encryption: node scripts/setup-encryption.js --flow-id <id>
2. Create endpoint: node scripts/set-data-endpoint.js --flow-id <id> --code-file <path>
3. Deploy: node scripts/deploy-data-endpoint.js --flow-id <id>
4. Register: node scripts/register-data-endpoint.js --flow-id <id>

Debug flows

• List responses: node scripts/list-flow-responses.js --flow-id <id>
• Function logs: node scripts/list-function-logs.js --flow-id <id>
• Function invocations: node scripts/list-function-invocations.js --flow-id <id>

Flow JSON rules

Static flows (no data endpoint):

• Use version: "7.3"
• routing_model and data_api_version are optional
• See assets/sample-flow.json

Dynamic flows (with data endpoint):

• Use version: "7.3" with data_api_version: "3.0"
• routing_model is required – defines valid screen transitions
• See assets/dynamic-flow.json

Read the full spec in references/whatsapp-flows-spec.md before editing.

Data endpoint rules

Handler signature:

async function handler(request, env) {
  const body = await request.json();
  // body.data_exchange.action: INIT | data_exchange | BACK
  // body.data_exchange.screen: current screen id
  // body.data_exchange.data: user inputs
  return Response.json({
    version: "3.0",
    screen: "NEXT_SCREEN_ID",
    data: { ... }
  });
}

• Do not use export or module.exports
• Completion uses screen: "SUCCESS" with extension_message_response.params
• Do not include endpoint_uri or data_channel_uri (Kapso injects these)

Scripts

Platform API

Meta proxy

Logs and responses

Troubleshooting

• Preview shows “flow_token is missing”: Flow is dynamic without a data endpoint. Attach one and refresh.
• Encryption setup errors: Enable encryption in Settings for the phone number/WABA.
• OAuthException 139000 (Integrity): WABA must be verified in Meta security center.

References

• references/whatsapp-flows-spec.md – Flow JSON spec (read before editing)
• assets/sample-flow.json – Static flow example (no endpoint)
• assets/dynamic-flow.json – Dynamic flow example (with endpoint)

Related skills

• whatsapp-messaging – WhatsApp messaging and templates
• kapso-automation – Workflow automation
• kapso-api – Platform API and customers