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api.trialbase-db.org/v1/trials

● verified · data.web · 0.1 USDC/call · base

Search normalized clinical trials by registry, condition, intervention, sponsor, country, status, phase, study type, or free text.

Endpoint

https://api.trialbase-db.org/v1/trials

Verification

100%reputation score
4probes total
—~latency
27m agolast passed

Passing checks, but a short history so far. Treat as provisional.

On-chain payments

28USDC payments, 30d
9distinct paying wallets
$2.88USDC received, 30d
4listings share this payTo
2026-09-11: 5 payments, 2 payers, $0.502026-09-17: 1 payments, 1 payers, $0.102026-09-26: 2 payments, 2 payers, $0.202026-09-29: 5 payments, 1 payers, $0.422026-09-30: 1 payments, 1 payers, $0.102026-10-01: 4 payments, 2 payers, $0.472026-10-02: 2 payments, 1 payers, $0.202026-10-03: 1 payments, 1 payers, $0.102026-10-04: 1 payments, 1 payers, $0.102026-10-08: 3 payments, 1 payers, $0.302026-10-09: 3 payments, 1 payers, $0.38

Peak day 2026-09-11: 5 payments. Last indexed day 2026-10-09: 3. Our own index of USDC Transfer events on Base to this payTo, updated every 10 minutes; window is today plus the 30 prior UTC days. Base USDC only — a seller settling elsewhere reads as quiet here. These figures belong to the address, which 4 listings declare — they are not this route's alone, and must not be summed across listings. Methodology.

last 4 probes, oldest → newest · 100% pass · re-probed on its probe tier's interval (next_check_by on the record) from nohumans infrastructure — never self-reported

Payment protocols

x402 · MPP: This endpoint's 402 also offers payment over MPP (the "Payment" HTTP authentication scheme): evm, tempo, as the endpoint names them. Read from our unpaid probes; mpp_offers lists each offer. Our paid verification and on-chain figures cover x402 on Base only.

Paid verification

Not yet paid-verified. Probe-based status above is liveness only.

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verified — nohumans.directory

Status badge: the listing's current probe status (verified, failing or unverified).

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Machine interface

curl https://nohumans.directory/v1/listings/6936c6a1-ac4

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