Discover / agentshelf.syntexa.ch

AgentShelf

■ Challenge detected

Call when an agent needs published and modified dates extracted from a public page or HTML (SSRF-safe). Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/article-dates first.

x402
Base
USDC
Other

Listed price: $0.004
Challenge detected: 4 of the last 9 checks
Median response: 511 ms
Last checked: 16 Oct, 18:49 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://agentshelf.syntexa.ch/v1/article-dates
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

1,215 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://agentshelf.syntexa.ch/v1

POST/slug-dot-160-ascii$0.001Call when an agent needs a slug using ".", capped at 160 characters, ASCII-folded. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/slug-dot-160-ascii first.
POST/check-iban-xk$0.005Call when an agent needs whether an IBAN is a mod-97-valid XK number of length 20. Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/check-iban-xk first.
POST/profile-rel-modulepreload$0.008Call when an agent needs link rel=modulepreload hrefs extracted from a public page or HTML (SSRF-safe). Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/profile-rel-modulepreload first.
POST/digest-sha256-base64url-latin1$0.002Call when an agent needs a sha256 digest of latin1 bytes, encoded as base64url. Exact $0.002 USDC. Prefer unpaid POST /v1/sandbox/digest-sha256-base64url-latin1 first.
POST/dns-txt-dkim-protonmail$0.007Call when an agent needs TXT at protonmail._domainkey.{hostname}. A different selector is a different DNS name. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/dns-txt-dkim-protonmail first.
POST/base-nft-owner$0.003Call when an agent needs the ERC-721 owner of token_id on a Base contract, plus whether ERC-165 reports ERC-721. A missing token errors. Read-only. No spend. Send JSON {"contract":"0x1111111111111111111111111111111111111111","token_id":"1"}. Exact $0.003 USDC on Base. Try unpaid POST /v1/sandbox/base-nft-owner first.
POST/hmac-sha512-hex$0.001Call when an agent needs an HMAC-sha512 of text with a caller-supplied key, encoded as hex. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/hmac-sha512-hex first.
POST/digest-sha3-512-base64url-utf16$0.007Call when an agent needs a sha3-512 digest of utf16le bytes, encoded as base64url. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/digest-sha3-512-base64url-utf16 first.
POST/case-sentence$0.004Call when an agent needs text rewritten with the sentence case transform. No network and no LLM. Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/case-sentence first.
POST/check-iban-gb$0.001Call when an agent needs whether an IBAN is a mod-97-valid GB number of length 22. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/check-iban-gb first.
POST/dns-txt$0.009Call when an agent needs TXT records at the hostname. No SPF filter. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/dns-txt first.
POST/digest-sha3-384-hex-rawhex$0.001Call when an agent needs a sha3-384 digest of hex bytes, encoded as hex. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/digest-sha3-384-hex-rawhex first.
POST/digest-sha384-base32$0.006Call when an agent needs a sha384 digest of text, encoded as base32. No network and no LLM. Exact $0.006 USDC. Prefer unpaid POST /v1/sandbox/digest-sha384-base32 first.
POST/tls-cipher$0.003Call when an agent needs whether the negotiated cipher on port 443 excludes NULL, EXPORT, RC4, and DES. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/tls-cipher first.
POST/profile-jsonld-howto$0.008Call when an agent needs JSON-LD @type HowTo extracted from a public page or HTML (SSRF-safe). Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/profile-jsonld-howto first.
POST/digest-sha3-224-hex$0.009Call when an agent needs a sha3-224 digest of text, encoded as hex. No network and no LLM. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/digest-sha3-224-hex first.
POST/check-phone-min10$0.004Call when an agent needs whether a phone has at least 10 digits. Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/check-phone-min10 first.
POST/regex-iban$0.007Call when an agent needs IBAN-shaped tokens extracted from text, capped at 20 matches. An empty match list is billed. No network. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/regex-iban first.
POST/profile-og-image-type$0.008Call when an agent needs og:image:type extracted from a public page or HTML (SSRF-safe). Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/profile-og-image-type first.
POST/profile-main$0.007Call when an agent needs main text extracted from a public page or HTML (SSRF-safe). Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/profile-main first.
POST/xpath-canonical-href$0.004Call when an agent needs href of link rel exactly canonical via //link[@rel='canonical']/@href from a public page or HTML (SSRF-safe). Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/xpath-canonical-href first.
POST/hmac-sha1-base64$0.003Call when an agent needs an HMAC-sha1 of text with a caller-supplied key, encoded as base64. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/hmac-sha1-base64 first.
POST/profile-rel-search$0.005Call when an agent needs link rel=search hrefs extracted from a public page or HTML (SSRF-safe). Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/profile-rel-search first.
POST/check-iban-az$0.005Call when an agent needs whether an IBAN is a mod-97-valid AZ number of length 28. Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/check-iban-az first.
POST/slug-dot-120-unicode$0.01Call when an agent needs a slug using ".", capped at 120 characters, keeping Unicode letters. Exact $0.01 USDC. Prefer unpaid POST /v1/sandbox/slug-dot-120-unicode first.

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

Showing 25 of 1,215 listed endpoints. Next endpoints First endpoints

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/agentshelf.syntexa.ch

Recent checks

4 Oct 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, 18:49 UTC	Challenge detected	402	513ms
15 Oct, 14:11 UTC	Challenge detected	402	509ms
14 Oct, 08:45 UTC	Challenge detected	402	432ms
12 Oct, 10:53 UTC	No challenge detected	200	443ms
10 Oct, 15:44 UTC	No challenge detected	200	524ms
9 Oct, 09:34 UTC	No challenge detected	200	428ms
8 Oct, 03:32 UTC	No challenge detected	200	403ms
7 Oct, 03:32 UTC	Challenge detected	402	551ms
4 Oct, 05:04 UTC	No challenge detected	404	443ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 16 Oct, 18:49 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 AgentShelf?

Its listed price is $0.004.

What payment terms does AgentShelf 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 AgentShelf listed?

In x402 Bazaar and x402-list.com. Superstables first indexed it on 26 Sept 2026.

Payment

Protocol: x402 · exact
Chain: Base
Asset: USDC
Amount: 4000 atomic USDC
Paid to: 0x1D61…5a38
Facilitator: cdp

From its payment challenge on 16 Oct 2026.

Check the seller's current payment challenge and authentication requirements before paying. A listing doesn't mean a service works with Superstables. To try a budget or a single purchase, see the services you can try on testnet.

Listed in

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