# BulkSMS Attachments API

**Canonical:** https://apis.io/apis/bulksms/bulksms-attachments-api/  
**Provider:** BulkSMS — https://apis.io/providers/bulksms/  
**Base URL:** https://api.bulksms.com/v1  
**Documentation:** https://www.bulksms.com/developer/

BulkSMS Attachments API is one of 6 APIs that [BulkSMS](https://apis.io/providers/bulksms/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. This API exposes 6 JSON Schema definitions. Tagged areas include Attachments. The published artifact set on APIs.io includes an OpenAPI specification and 6 JSON Schemas.

Operations related to SMS attachments

## Operations (1)

| Method | Path | Summary |
|---|---|---|
| POST | `/rmm/pre-sign-attachment` | Upload an attachment via a signed URL |

## Machine-readable artifacts (8)

- **OpenAPI** — https://artifacts.apis.io/bulksms/openapi/bulksms-attachments-api-openapi.yml
- **JSONSchema** — https://artifacts.apis.io/bulksms/json-schema/bulksms-submission-entry-schema.json
- **JSONSchema** — https://artifacts.apis.io/bulksms/json-schema/bulksms-message-schema.json
- **JSONSchema** — https://artifacts.apis.io/bulksms/json-schema/bulksms-webhook-entry-schema.json
- **JSONSchema** — https://artifacts.apis.io/bulksms/json-schema/bulksms-profile-schema.json
- **JSONSchema** — https://artifacts.apis.io/bulksms/json-schema/bulksms-transfer-entry-schema.json
- **JSONSchema** — https://artifacts.apis.io/bulksms/json-schema/bulksms-pre-sign-info-schema.json
- **APIsJSON** — https://artifacts.apis.io/bulksms/apis.yml

## Other BulkSMS APIs (5)

- [BulkSMS Blocked Numbers API](https://apis.io/apis/bulksms/bulksms-blocked-numbers-api/)
- [BulkSMS Credits API](https://apis.io/apis/bulksms/bulksms-credits-api/)
- [BulkSMS Message API](https://apis.io/apis/bulksms/bulksms-message-api/)
- [BulkSMS Profile API](https://apis.io/apis/bulksms/bulksms-profile-api/)
- [BulkSMS Webhooks API](https://apis.io/apis/bulksms/bulksms-webhooks-api/)

## Tags

Attachments

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/bulksms/bulksms-attachments-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/bulksms/.