Discover / otp.openverbs.com

Build otpauth:// URI

■ Challenge detected

Build an otpauth:// provisioning URI (the string encoded in authenticator QR codes) for a totp or hotp secret. Includes label, issuer, algorithm, digits and period (totp) or counter (hotp). The secret must be valid base32.

x402
Base
USDC

Listed price: $0.004
Challenge detected: 9 of the last 9 checks
Median response: 180 ms
Last checked: 16 Oct, 13:59 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://otp.openverbs.com/v1/uri
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

4 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

Base URLhttps://otp.openverbs.com/v1

POST/verify$0.004Verify a submitted TOTP code against a base32 secret, scanning ±window time steps (default ±1) to tolerate clock drift. Returns valid plus the matching step offset (delta). A code that does not match is a successful result with valid=false — not an error.
POST/hotp$0.004Generate an RFC 4226 counter-based HMAC one-time password from a base32 secret and counter. Configurable digits (6–10, default 6) and algorithm (SHA1/SHA256/SHA512, default SHA1). An invalid base32 secret is a clean 400.
POST/uri$0.004Build an otpauth:// provisioning URI (the string encoded in authenticator QR codes) for a totp or hotp secret. Includes label, issuer, algorithm, digits and period (totp) or counter (hotp). The secret must be valid base32.
POST/totp$0.004Generate an RFC 6238 time-based one-time password from a base32 secret. Uses the current time by default, or an explicit unix timestamp (seconds); configurable period (default 30s), digits (default 6) and algorithm (default SHA1). Also returns the counter and seconds remaining in the window.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 4 of 4 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/otp.openverbs.com

Recent checks

30 Sept 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.16 Oct 2026

All 9 checks

When (UTC)	Result	HTTP	Response
16 Oct, 13:59 UTC	Challenge detected	402	180ms
15 Oct, 08:20 UTC	Challenge detected	402	177ms
13 Oct, 20:45 UTC	Challenge detected	402	161ms
11 Oct, 19:34 UTC	Challenge detected	402	255ms
10 Oct, 03:32 UTC	Challenge detected	402	176ms
9 Oct, 00:47 UTC	Challenge detected	402	177ms
7 Oct, 21:31 UTC	Challenge detected	402	182ms
6 Oct, 18:37 UTC	Challenge detected	402	262ms
30 Sept, 17:04 UTC	Challenge detected	402	199ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 16 Oct, 13:59 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for Build otpauth:// URI?

Its listed price is $0.004.

What payment terms does Build otpauth:// URI advertise?

The listing advertises x402, Base and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is Build otpauth:// URI listed?

In x402 Bazaar. Superstables first indexed it on 26 Sept 2026.

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