# Every answer cites the record it came from, and says what it does not cover. Structured answers over public US records on food, supplements, substances and labels, served to agents over MCP. 7 lookups are free; 4 tools are metered at $0.05 an answer billed to an account, or at $0.50 paid with the call. [Connect an agent →](https://citature.com/mcp/) [See a receipt, field by field →](https://citature.com/receipts/) ## One call, and what came back A real answer from `reference_amounts`. Open its citation and you read the same words at the source. reference_amounts(section: "101.12", label: "bread", limit: 3) - Biscuits, croissants, tortillas, soft bread sticks, soft pretzels, corn bread, hush puppies, scones, crumpets, English muffins 55 g - Breads (excluding sweet quick type), rolls 50 g 21 CFR 101.12 · Electronic Code of Federal Regulations [Open the text ↗](https://www.ecfr.gov/api/versioner/v1/full/2026-10-02/title-21.xml?part=101§ion=101.12) - **published**: 2018-12-21 - **as of**: 2018-12-21 - **retrieved**: 2026-10-06 2 of 3 rows · 5 coverage notes · 5 guardrails · match exact · schema 1.1.0 *served · excerpt of one answer* [The whole receipt, field by field →](https://citature.com/receipts/) ## 11 tools, one endpoint The lookups restate a public record and never reach the meter. The metered tools do the work nobody else assembles — one substance vocabulary across food, supplement and regulatory records — billed per served answer, and a call that returned nothing is never billed. ### Free · 7 - [gtin_resolve](https://citature.com/tools/gtin_resolve/) - [food_lookup](https://citature.com/tools/food_lookup/) - [supplement_lookup](https://citature.com/tools/supplement_lookup/) - [drug_label_lookup](https://citature.com/tools/drug_label_lookup/) - [ingredient_resolve](https://citature.com/tools/ingredient_resolve/) - [substance_lookup](https://citature.com/tools/substance_lookup/) - [reference_amounts](https://citature.com/tools/reference_amounts/) ### Metered · 4 - [rule_evaluate $0.05 / evaluation $0.50 paid with the call](https://citature.com/tools/rule_evaluate/) - [enforcement_check $0.05 / check $0.50 paid with the call](https://citature.com/tools/enforcement_check/) - [adverse_events $0.05 / check $0.50 paid with the call](https://citature.com/tools/adverse_events/) - [dietary_intake $0.05 / estimate $0.50 paid with the call](https://citature.com/tools/dietary_intake/) [What each one answers →](https://citature.com/tools/) ## What it will not say - **Not advice**: Research over public records and product labels — not medical, nutritional, or safety advice. - **No verdicts**: citature reports what the record says. It never renders a verdict, a pass/fail, a diagnosis, or a recommendation, and is not a substitute for a clinician. - **No individuals**: Answers are product-, substance- or population-level only — foods, supplements, labels, substances, enforcement actions, and dietary intake as a weighted survey estimate. No answer returns or describes an individual person, and citature links no record to individually identifiable data. - **Silence is not absence**: A record that does not declare something is not a record declaring its absence. citature reports what a record states; it cannot report what a product does not contain, or what a population did not consume. - **A Daily Value is not a DRI**: A Daily Value is a labelling reference from federal regulation, not a Dietary Reference Intake. citature carries no licensed source for Dietary Reference Intakes and does not estimate whether anyone meets a nutrient requirement. ## Register the endpoint once. Every tool comes with it, and the lookups answer without a credential. [Connect an agent →](https://citature.com/mcp/) [Wiring it up →](https://citature.com/help/) [Questions →](https://citature.com/faq/) --- The page this is the markdown of: