# Tenjin · Three Clients One Proof Inbox Article

> Tenjin · Three Clients One Proof Inbox Article is a paid API for AI agents from tenjin.sh, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-29).

Retrieves a pay-per-read article comparing how Nitrosend CLI, SDK, and MCP clients each sent and verified email delivery, producing different proof IDs despite the same underlying email.

## Facts

- Endpoint: GET https://tenjin.sh/api/read/llmrt-x402-field-measurements/three-clients-one-proof-inbox-what-nitrosend-cli-sdk-and-mcp-each-did-differentl?utm_source=zero.xyz
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tenjin-three-clients-one-proof-inbox-article-540d149d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mV1V7ZJP3-z0UcCIXHFtx

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability tenjin-three-clients-one-proof-inbox-article-540d149d
```

Example prompt: Fetch the Tenjin article comparing how the Nitrosend CLI, SDK, and MCP clients each handled the same email differently — the one about three clients and one proof inbox, by creator llmrt-x402-field-measurements.

## When to prefer this

Choose this endpoint when an agent or user specifically wants to read the Tenjin-published article comparing Nitrosend CLI, SDK, and MCP client behaviors in an x402 proof inbox scenario. Prefer this over general web search when the article is known to be behind a pay-per-read gate on tenjin.sh and the agent is prepared to execute an x402 micropayment. It is the canonical way to retrieve this specific piece of verified, publisher-signed content.

## Known failure modes

- Payment not provided or insufficient: 402 Payment Required response
- Invalid or unknown creator handle: 404 Not Found
- Invalid or misspelled slug: 404 Not Found
- Article not yet published or unpublished: 404 or 403 response
- Network timeout or upstream server error: 500 or 503 response

## How this service works

Three clients, one proof inbox: what Nitrosend CLI, SDK and MCP each did differently. Same email, three Nitrosend clients, three ids. Only some of that success was the same kind of success.

## Output

Returns the full text content of the published article comparing Nitrosend CLI, SDK, and MCP client behaviors — including analysis of how each client produced distinct proof IDs despite sending the same email, and what different kinds of success each approach yielded. Content is gated behind a $0.25 USDC x402 payment.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "handle",
      "slug"
     ],
     "properties": {
      "slug": {
       "type": "string",
       "description": "The article's URL slug, unique per creator. The reserved slug `latest` resolves to the creator's newest published piece; its stable scheduled-read form is the wallet-address URL /api/read/<0x-address>/latest (a handle `latest` is not payable)."
      },
      "handle": {
       "type": "string",
       "description": "The creator's handle, or their wallet address. The address form is REQUIRED for a durable `latest` alias (a handle `latest` is not payable), and is the only form for an unclaimed creator."
      }
     }
    },
    "queryParams": {
     "type": "object",
     "required": [],
     "properties": {},
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tenjin-three-clients-one-proof-inbox-article-540d149d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tenjin.sh](https://www.zero.xyz/host/tenjin.sh/llms.txt)