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Tenjin Knowledge Marketplace – Preserve HTTP 402 Payment Terms in LangChain Tools for Agent Souk
x402
Tenjin Knowledge Marketplace – Preserve HTTP 402 Payment Terms in LangChain Tools for Agent Souk is a paid API for AI agents from tenjin.sh, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Retrieves a verified, pre-researched knowledge article explaining how to preserve HTTP 402 payment terms when building LangChain tools for use in agent marketplaces.
Price / call$0.05
Success—
StatusUnknown
How this service works
Tenjin is a knowledge marketplace for AI agents: buy verified answers and tested research, each finding on its own. Creators earn as their knowledge is used.
Output
Returns a JSON object containing the article's unique ID, canonical URL, slug, tags (e.g. x402, langchain, agent-souk), price in micro-units, full title, creator handle and display name, a plain-language excerpt summarizing the key findings, and the publication timestamp.
Example use cases
LangChain x402 integration research
“I'm building a LangChain agent that needs to call paid x402 APIs — can you pull up the Tenjin article about how to preserve HTTP 402 payment terms in LangChain tools so I know exactly how to structure my tool definitions?”
Agent marketplace tool compliance check
“Before I publish my tool to Agent Souk, I want to make sure I'm handling x402 payment headers correctly — grab me the Tenjin research piece on preserving 402 payment terms in LangChain tools.”
Onboarding team to x402 LangChain patterns
“I need to share a reliable, tested reference with my team on how x402 payment terms work inside LangChain tools — can you retrieve that verified Tenjin article on the topic for me?”
Technical details
Endpoint
GEThttps://tenjin.sh/api/read/0xe4f7077f75438e2d63a6112b854f1e666dc74f1b/preserve-http-402-payment-terms-in-langchain-tools-for-agent-soukWhen to prefer
Choose this endpoint when you need a single, verified, human-authored research article on the specific topic of preserving HTTP 402 payment terms in LangChain tool construction for agent marketplaces. Prefer it over generic web search when you want a tested, citable answer rather than raw search results, and when you are operating in an x402-capable agent context that can handle microtransaction gating automatically.
Side effects
- Payment not fulfilled (402): the caller has not paid the $0.05 USDC fee, no content returned
- Article not found (404): the slug or wallet address in the path is invalid or the article has been removed
- Facilitator unavailable: the x402 payment facilitator is down, blocking access
- Network timeout: the endpoint does not respond within expected latency window
- Malformed request: incorrect URL path structure results in a routing error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| required | string | |
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"id": "019f5e1d-3c0e-7b8d-824f-785faafd7bea",
"url": "https://tenjin.sh/a/athoughts/x402-batch-settlement-how-the-protocol-s-payment-channel-voucher-scheme-actually",
"slug": "x402-batch-settlement-how-the-protocol-s-payment-channel-voucher-scheme-actually",
"tags": [
"x402",
"protocol",
"batch-settlement",
"payment-channels",
"metering"
],
"price": "100000",
"title": "x402 batch settlement: how the protocol's payment-channel/voucher scheme actually works",
"creator": {
"handle": "athoughts",
"displayName": "athoughts"
},
"excerpt": "A from-the-spec explainer of x402's batch-settlement scheme (a stateless unidirectional payment channel with cumulative signed vouchers) for anyone building a metered or streaming x402 service and deciding between exact and batch. Cadence knobs, the escrow deposit flow, and the facilitator-support gotcha. As-of 2026-07-13.",
"publishedAt": "2026-07-14T00:53:22.064Z"
}
}Tags
x402
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