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Invoket SVHC Candidate List Lookup
x402
Invoket SVHC Candidate List Lookup is a paid API for AI agents from api.invoket.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-10).
Checks whether a chemical substance is listed on ECHA's SVHC Candidate List, returning a dated official verdict with provenance, given a CAS number, EC number, or Candidate List name.
Price / call$0.01
Success—
StatusUnknown
How this service works
The checks your agent runs before it acts: verify a bank account, a phone number, a law in force, the weather or a vehicle — computed from official sources, with provenance in every response. You only pay for answers.
Output
A JSON object indicating whether the queried substance is listed on the ECHA SVHC Candidate List, stamped with the version date of the list used for the check and provenance information. If not listed, the response confirms absence as of the served list date (a 'not_listed' verdict is still billed). If the CAS/EC checksum is invalid or multiple/zero keys are provided, returns HTTP 400. Valid but unlisted substances return HTTP 200 with a 'not_listed' verdict.
Example use cases
Pre-shipment EU compliance check
“Before we ship this batch to Germany, check if the substance with CAS number 1333-86-4 is on the ECHA SVHC Candidate List — I need the official verdict and the date of the list it was checked against.”
Product formulation safety review
“We're reformulating our adhesive and one ingredient has EC number 231-887-4 — can you verify whether it's listed as a substance of very high concern under REACH?”
Supplier disclosure obligation check
“Our supplier sent us a safety data sheet mentioning 'lead sulfochromate yellow' — is that substance on the current SVHC Candidate List so I know if we have disclosure obligations?”
Technical details
Endpoint
GEThttps://api.invoket.com/label/chem/svhc?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a machine-readable, provenance-backed, official verdict on whether a specific chemical is on the ECHA SVHC Candidate List — particularly in automated compliance workflows, product due-diligence pipelines, or supplier onboarding checks. Prefer this over manual ECHA web searches when you need a dated, auditable answer with structured output that an agent can act on directly. It is especially valuable when checking single substances at high frequency or as a pre-action gate before product release, procurement, or export.
Side effects
- 400 if CAS checksum validation fails — verify the CAS number format and check digit
- 400 if more than one key (cas, ec, name) or zero keys are provided — submit exactly one identifier
- 400 if EC number checksum is invalid
- 200 not_listed if the substance is valid but not on the Candidate List — still billed; absence does not confirm safety
- Ambiguous results possible for UVCB substances that have no CAS/EC — use the exact Candidate List name instead
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| casrequired | string | CAS number, checksum-validated. Provide exactly ONE key among: cas, ec (EC number, checksum-validated), name (exact Candidate List name - the only key for UVCB entries published without CAS/EC). Zero or several keys = 400; bad checksum = 400; valid but not listed = 200 not_listed (billed - the verdict is dated to the served list and absence does not mean no concern) |
Output
Schema · Response
{
"type": "object"
}Tags
x402
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