Send Sms Textbelt Agent Skill
Send SMS text messages to phone numbers. Use when the user asks to send a text, send an SMS, text someone, message a phone number, or send a notification via text message.
Install
one command, takes just this skill from the repositorynpx skills add https://github.com/gooseworks-ai/goose-skills --skill send-sms-textbeltWhat comes with it
283 bytes besides the instructionThe instruction itself
12 sections, as written by the authorSend Text Message
Setup
Read your credentials from ~/.gooseworks/credentials.json:
export GOOSEWORKS_API_KEY=$(python3 -c "import json;print(json.load(open('$HOME/.gooseworks/credentials.json'))['api_key'])")
export GOOSEWORKS_API_BASE=$(python3 -c "import json;print(json.load(open('$HOME/.gooseworks/credentials.json')).get('api_base','https://api.gooseworks.ai'))")
If ~/.gooseworks/credentials.json does not exist, tell the user to run: npx gooseworks login
All endpoints use Bearer auth: -H "Authorization: Bearer $GOOSEWORKS_API_KEY"
Send SMS messages via the Textbelt API on Orthogonal.
Workflow
Step 1: Gather Info
Ask the user for:
- Phone number (required) - US/Canada: 10-digit with area code. International: E.164 format (e.g., +44...)
- Message (required) - Max 800 characters. No URLs allowed.
Step 2: Send the Message
curl -s -X POST $GOOSEWORKS_API_BASE/v1/proxy/orthogonal/run \
-H "Authorization: Bearer $GOOSEWORKS_API_KEY" \
-H "Content-Type: application/json" \
-d '{"api":"textbelt","path":"/text"}'
"phone": "<phone_number>",
"message": "<message_text>"
}'
Step 3: Confirm Delivery
The response includes a textId. Use it to check delivery status:
curl -s -X POST $GOOSEWORKS_API_BASE/v1/proxy/orthogonal/run \
-H "Authorization: Bearer $GOOSEWORKS_API_KEY" \
-H "Content-Type: application/json" \
-d '{"api":"textbelt","path":"/status/{textId}"}'
This endpoint is free.
Response
Send Response (/text)
- success (boolean) -
trueif message was queued - textId (string) - Message ID for delivery tracking (only on success)
- quotaRemaining (integer) - Remaining SMS credits
- error (string) - Error message (only on failure)
Status Response (/status/{textId})
- status (string) -
DELIVERED,SENDING,FAILED, orUNKNOWN
Constraints
- Max 800 characters per message
- No URLs in message text
- Sender name is optional and not visible to the recipient in most countries
Optional Parameters
When sending, you can also include:
sender(string) - Business/org name for regulatory purposesreplyWebhookUrl(string) - US only: URL to receive reply webhookswebhookData(string) - Extra data passed to webhook (max 100 chars)
Error Handling
- success: false with
errorfield describes the issue (e.g., invalid phone number, insufficient credits) - US/Canada numbers only work from US/Canada IP region
- International numbers require E.164 format (e.g.,
+44...) - Messages containing URLs are rejected — use descriptions instead
- Max 800 characters — longer messages are rejected, not truncated
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How to use it
Take gooseworks-ai/send-sms-textbelt from the repository into ~/.claude/skills for personal
use, or into .claude/skills inside a project.
The agent identifies a skill by the name field in its header. Two skills with the
same name cannot sit side by side — one of them will be ignored.
The instructions reference npx.
Without those the skill loads but fails at the first command.