World-Text HTTP API specification
The machine-readable OpenAPI description of the World Text SMS API: sending messages, delivery receipts, coverage and number lookups, and group management.
Download the specification
/openapi/spec.yaml
— OpenAPI 3.0, YAML. Free to fetch, cache and feed to a client generator.
The specification is the source of truth for the published reference. Every endpoint, parameter and response documented in human-readable form on the developer reference is generated from this file, so the two cannot disagree.
Read it as documentation
- Developer reference — the full API guide, including authentication, every parameter and every response field.
- Introduction and base URL
- Sending SMS
- Number lookups (HLR and MNP)
- Group management
- Response schemas
Related
- Developer APIs — what the API can do and how to get a key.
- HTTP REST API
- SMS restrictions and sender rules by country
- Contact us