{"api":"v1","generated_at":"2026-09-16T04:38:31.602Z","licence":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/","attribution":"TOLL, with a link to the page cited"},"page":"https://tollindex.com/e/chem-openverbs-com-v1-molar-mass-52895c","pinned_page":"https://tollindex.com/e/chem-openverbs-com-v1-molar-mass-52895c/at/2026-09-15T21-20Z","pinned":false,"method":"https://tollindex.com/ledger/method","snapshot_at":"2026-09-15T21:20:12.737Z","snapshot_stamp":"2026-09-15T21-20Z","endpoint":{"slug":"chem-openverbs-com-v1-molar-mass-52895c","canonical_url":"https://chem.openverbs.com/v1/molar-mass","resource":"https://chem.openverbs.com/v1/molar-mass","http_method":"POST","type":"http","x402_version":2,"registries":["cdp"],"primary_registry":"cdp","curated_by_coinbase":false,"description":"Compute the molar mass (g/mol) of a chemical formula. Supports nested parentheses and brackets, element multipliers, and hydrate dot notation with coefficients (e.g. \"Ca(OH)2\", \"CuSO4·5H2O\", \"K4[Fe(CN)6]\"). Returns the total mass and the per-element composition with mass fraction percentages.","service_name":"Molar mass","declared_category":null,"declared_tags":["molar mass","calculate molecular weight","chemical formula mass","formula composition","molar mass api"],"route_template":null,"registry_updated":"2026-09-06T08:14:59.008Z"},"derived":{"note":"fields no registry supplies; TOLL derives them and marks them derived on the page","title":"molar mass","category":"compute","first_observed_by_toll":"2026-09-10T19:08:24.178Z","last_observed_by_toll":"2026-09-15T21:20:12.737Z","observation_began":"2026-09-10"},"presence":{"listed_now":true,"first_absent_at":null,"delisting_confirmed_at":null,"events":[{"registry":"cdp","at":"2026-09-10T19:08:24.178Z","event":"listed"}]},"accepts":[{"registry":"cdp","ordinal":0,"network":"eip155:8453","asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","asset_name":"USD Coin","symbol":"USDC","decimals":6,"amount_display":"0.004 USDC","amount_units":0.004,"decimals_known":true,"pay_to":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A","scheme":"exact"}],"counters":{"observed_at":"2026-09-15T21:20:12.737Z","calls_30d":3,"unique_payers_30d":1,"last_called_at":"2026-09-06T08:14:58.729Z"},"validation":{"latest":{"observed_at":"2026-09-15T04:45:09.881Z","state":"pass","failed_checks":["bazaar.info.output"],"endpoint_http_status":402,"run_id":"daily-2026-09-15"},"uptime":[{"days":7,"observed":5,"passed":5,"ratio":1},{"days":30,"observed":5,"passed":5,"ratio":1},{"days":90,"observed":5,"passed":5,"ratio":1}],"history_90d":[{"observed_at":"2026-09-15T04:45:09.881Z","state":"pass","failed_checks":["bazaar.info.output"],"run_id":"daily-2026-09-15","state_changed":false},{"observed_at":"2026-09-14T04:40:32.143Z","state":"pass","failed_checks":["bazaar.info.output"],"run_id":"daily-2026-09-14","state_changed":false},{"observed_at":"2026-09-13T04:38:33.267Z","state":"pass","failed_checks":["bazaar.info.output"],"run_id":"daily-2026-09-13","state_changed":false},{"observed_at":"2026-09-12T06:55:11.800Z","state":"pass","failed_checks":["bazaar.info.output"],"run_id":"daily-2026-09-12","state_changed":false},{"observed_at":"2026-09-11T10:30:25.629Z","state":"pass","failed_checks":["bazaar.info.output"],"run_id":"daily-2026-09-11","state_changed":true}]},"seller":{"wallet":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A","page":"https://tollindex.com/seller/0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A","endpoints":370,"hosts":89},"reports":0,"registry_record":{"cdp":[{"tags":["molar mass","calculate molecular weight","chemical formula mass","formula composition","molar mass api"],"type":"http","accepts":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A","amount":"4000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300}],"quality":{"lastCalledAt":"2026-09-06T08:14:58.729Z","l30DaysTotalCalls":3,"l30DaysUniquePayers":1},"resource":"https://chem.openverbs.com/v1/molar-mass","extensions":{"bazaar":{"info":{"input":{"body":{"formula":"example"},"type":"http","method":"POST","bodyType":"json"}},"schema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method","bodyType","body"],"properties":{"body":{"type":"object","required":["formula"],"properties":{"formula":{"type":"string","maxLength":200,"minLength":1,"description":"Chemical formula, e.g. \"Ca(OH)2\"."}},"additionalProperties":false},"type":{"type":"string","const":"http"},"method":{"enum":["POST"],"type":"string"},"bodyType":{"enum":["json","form-data","text"],"type":"string"}},"additionalProperties":false}}}}},"description":"Compute the molar mass (g/mol) of a chemical formula. Supports nested parentheses and brackets, element multipliers, and hydrate dot notation with coefficients (e.g. \"Ca(OH)2\", \"CuSO4·5H2O\", \"K4[Fe(CN)6]\"). Returns the total mass and the per-element composition with mass fraction percentages.","lastUpdated":"2026-09-06T08:14:59.008Z","serviceName":"Molar mass","x402Version":2}]}}