Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/openapi/openapi-skills/openapi-messagingnpx skills add openapi/openapi-skills --skill openapi-messaginggit clone --depth 1 https://github.com/openapi/openapi-skillsWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00072 | $0.00664 |
| Opus 5 | $0.00036 | $0.00332 |
| Sonnet 5 | $0.00014 | $0.00133 |
| Haiku 4.5 | $0.00007 | $0.00066 |
Grade A, and why
openapi-messaging scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -s -X POST https://sms.openapi.com/IT-messages \ How it starts
The opening of the file, as written. The whole thing — 39 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Openapi messaging & communications
All services use a Bearer token (see the openapi-auth skill). Every send is an outward-facing, paid action: always confirm recipient, content and cost with the user before sending.
SMS v2 — https://sms.openapi.com
POST /IT-messages(Italy),POST /ES-messages(Spain),POST /WW-messages(worldwide)POST /otp— OTP verification messagesGET /messages,GET /messages/{id}— sent messages and delivery status
Features: custom sender, E.164 validation, GSM-7/UCS-2 detection with automatic segmentation, dry_run for free testing, webhook delivery callbacks. Messages expire after 48h (status EXPIRED). Worldwide pricing is computed post-sending and requires a minimum credit balance. SMS v1 (ws.messaggisms.com) is deprecated.
curl -s -X POST https://sms.openapi.com/IT-messages \
-H "Authorization: Bearer $OPENAPI_TOKEN" \
-H 'Content-Type: application/json' \
-d '{"sender": "MyBrand", "body": "Hello!", "recipients": ["+39333…"], "options": {"dry_run": true}}'
PEC (certified e-mail) — https://pec.openapi.it
Activate and manage Legalmail certified e-mail boxes (creation, renewal, configuration).
Massive REM — https://ws.pecmassiva.com
Bulk certified e-mail sending; check delivery-verification and receipt-verification status per message.
Postal Service — https://ws.ufficiopostale.com
Physical mail via Poste Italiane. Same pattern per product: POST /<product>/ (create, returns prices) → PATCH /<product>/{id} (confirm, or pass autoconfirm: true) → status callbacks to your callback URL → GET /<product>/{id}/accettazione (acceptance receipt).
Products: raccomandate and raccomandate_smart (registered mail), telegrammi, ordinarie, prioritarie, posta_massiva, posta_massiva_top, atti_giudiziari (judicial acts, with digital return receipt). Helpers: GET /pricing/, GET /nazioni/, GET /covers/, GET /dug/. Error responses include data.wrong_fields[] pinpointing invalid fields.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 39 lines · 72 tokens per session scan A 897b65d45838
openapi-messaging is a skill published in the GitHub repository openapi/openapi-skills (2 stars, last pushed 2mo ago), licensed MIT. It adds 72 tokens to every session and 664 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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