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: 5 of the last 10 checks
Median response: 509 ms
Last checked: 17 Oct, 18:25 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/check-vat-de$0.005Call when an agent needs whether a DE VAT checksum is valid. No registry lookup. Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/check-vat-de first.
POST/css-a-hreflang$0.004Call when an agent needs anchor hreflang values via a[hreflang] from a public page or HTML (SSRF-safe). Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/css-a-hreflang first.
POST/digest-sha512-224-base32-rawhex$0.002Call when an agent needs a sha512-224 digest of hex bytes, encoded as base32. Exact $0.002 USDC. Prefer unpaid POST /v1/sandbox/digest-sha512-224-base32-rawhex first.
POST/check-email-plus-reject$0.01Call when an agent needs whether an email is rejected because the local part contains a plus tag. Exact $0.01 USDC. Prefer unpaid POST /v1/sandbox/check-email-plus-reject first.
POST/digest-sha3-224-base64url-rawhex$0.003Call when an agent needs a sha3-224 digest of hex bytes, encoded as base64url. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/digest-sha3-224-base64url-rawhex first.
POST/profile-meta-author$0.006Call when an agent needs the meta author extracted from a public page or HTML (SSRF-safe). Exact $0.006 USDC. Prefer unpaid POST /v1/sandbox/profile-meta-author first.
POST/check-iban-ad$0.002Call when an agent needs whether an IBAN is a mod-97-valid AD number of length 24. Exact $0.002 USDC. Prefer unpaid POST /v1/sandbox/check-iban-ad first.
POST/dns-txt-dkim-default$0.008Call when an agent needs TXT at default._domainkey.{hostname}. A different selector is a different DNS name. Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/dns-txt-dkim-default first.
POST/digest-sha512-base64url-rawhex$0.007Call when an agent needs a sha512 digest of hex bytes, encoded as base64url. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/digest-sha512-base64url-rawhex first.
POST/toc-md$0.001Call when an agent needs a markdown heading table of contents. No network. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/toc-md first.
POST/ens-resolve$0.004Call when an agent needs an Ethereum mainnet ENS forward (.eth to address) or reverse lookup. Send name or address, not both. No CCIP-read and no offchain gateway. Unresolved is resolved false. Send JSON {"name":"vitalik.eth"}. Exact $0.004 USDC on Base. Try unpaid POST /v1/sandbox/ens-resolve first.
POST/check-issn$0.001Call when an agent needs whether an ISSN checksum is valid. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/check-issn first.
POST/holiday-check$0.003Call when an agent needs whether a YYYY-MM-DD date is a public holiday, plus the English name. Send date and country (ISO 3166-1 alpha-2). Covers US, CA, GB, IE, and much of Europe plus AU and NZ. Unknown countries error. No network. Send JSON {"date":"2026-12-25","country":"US"}. Exact $0.003 USDC on Base. Try unpaid POST /v1/sandbox/holiday-check first.
POST/json-to-md$0.001Call when an agent needs a JSON object or array converted to markdown (tables for array-of-objects). No network. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/json-to-md first.
POST/dns-srv-ldaps$0.008Call when an agent needs SRV records at _ldaps._tcp.{hostname} for LDAPS. The caller sends the registrable domain, not the underscored name. Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/dns-srv-ldaps first.
POST/hmac-ripemd160-base64url$0.004Call when an agent needs an HMAC-ripemd160 of text with a caller-supplied key, encoded as base64url. Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/hmac-ripemd160-base64url first.
POST/check-iban-rs$0.004Call when an agent needs whether an IBAN is a mod-97-valid RS number of length 22. Exact $0.004 USDC. Prefer unpaid POST /v1/sandbox/check-iban-rs first.
POST/check-vat-dk$0.003Call when an agent needs whether a DK VAT checksum is valid. No registry lookup. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/check-vat-dk first.
POST/check-vat-nl$0.008Call when an agent needs whether a NL VAT checksum is valid. No registry lookup. Exact $0.008 USDC. Prefer unpaid POST /v1/sandbox/check-vat-nl first.
POST/digest-sha512-256-base64url-utf16$0.009Call when an agent needs a sha512-256 digest of utf16le bytes, encoded as base64url. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/digest-sha512-256-base64url-utf16 first.
POST/hmac-ripemd160-base64$0.003Call when an agent needs an HMAC-ripemd160 of text with a caller-supplied key, encoded as base64. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/hmac-ripemd160-base64 first.
POST/dns-srv-ntp$0.005Call when an agent needs SRV records at _ntp._udp.{hostname} for NTP. The caller sends the registrable domain, not the underscored name. Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/dns-srv-ntp first.
POST/utc-now$0.001Call when an agent needs the current UTC time as an ISO timestamp plus unix seconds and milliseconds. Send an optional tz offset such as +02:00 to echo it. Local clock only. No network. Send JSON {}. Exact $0.001 USDC on Base. Try unpaid POST /v1/sandbox/utc-now first.
POST/digest-sha1-base64url$0.007Call when an agent needs a sha1 digest of text, encoded as base64url. No network and no LLM. Exact $0.007 USDC. Prefer unpaid POST /v1/sandbox/digest-sha1-base64url first.
POST/check-mac-dot$0.003Call when an agent needs whether a string is a Cisco dotted MAC address. Exact $0.003 USDC. Prefer unpaid POST /v1/sandbox/check-mac-dot 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.17 Oct 2026

All 10 checks

When (UTC)	Result	HTTP	Response
17 Oct, 18:25 UTC	Challenge detected	402	390ms
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 17 Oct, 18:25 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 17 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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