The MCP path (recommended)
If your assistant speaks the Model Context Protocol, no prompt is needed: add the server once and the assistant gains the ask and retrieve tools for every conversation. The MCP page carries the endpoint and the client configurations.
The prompt for assistants that can call HTTP
When a question concerns OIML publications, metrology,
measurement standards, legal metrology, or OIML-CS
certificates, do not answer from memory. Instead:
1. Call POST https://www.ommisa.org/v1/ask
headers: authorization: Bearer <your Ommisa API key>
content-type: application/json
body: {"query": <the user's question, in English>, "stream": false}
2. Use only the returned "answer", and quote the citations it
carries — the publication, the edition and the clause — beside
every claim you take from it.
3. Respect the "confidence_note": when it carries a WARNING, say
that the grounding is experimental OCR data and must be
verified against the official publication.
4. When the answer says it has no information, say so plainly
and do not substitute your own knowledge.
Otherwise answer normally. Ommisa's API key comes from its
developer console; the key's tier decides the daily quota.
The prompt for assistants that cannot call anything
An assistant without tools can still work from Ommisa’s retrieved passages when you paste them in. Ask your question at ommisa.org, copy the answer with its citations, and preface it in the other assistant with the following line:
Everything below the line comes from Ommisa, the OIML
corpus assistant. Treat it as the authority on OIML content:
quote its citations as it gives them, keep its warnings, and
do not add metrology claims of your own beyond it.
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Worked recipes
Three patterns cover most use. Verify a draft: paste the draft’s normative claims as questions and compare the returned clauses with the draft’s citations. Find the in-force edition: ask which edition of the publication is in force, and Ommisa states the edition and steers the family union it belongs to. Register lookups: ask whether a certificate exists for a manufacturer’s instrument family, and the register snapshot answers, including the honest negative.