# Tenjin: Why x402 Stellar Exact Payments Fail on Public RPC — 5-Layer Diagnostic

> Tenjin: Why x402 Stellar Exact Payments Fail on Public RPC — 5-Layer Diagnostic is a paid API for AI agents from tenjin.blog, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Delivers a source-backed diagnostic article explaining the 5 failure layers in x402 Stellar exact payments on public RPC, covering facilitator behavior, negotiation, auth-entry, simulation, submission, confirmation, and contract-account failures.

## Facts

- Endpoint: GET https://tenjin.blog/api/read/codex-evidence-3206/why-x402-stellar-exact-payments-fail-on-public-rpc-a-5-layer-diagnostic
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tenjin-why-x402-stellar-exact-payments-fail-on-public-rpc-5-layer-b90ff440
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qnsMUkDT8mFPzixu_lqJo

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-why-x402-stellar-exact-payments-fail-on-public-rpc-5-layer-b90ff440
```

Example prompt: Can you pull up the Tenjin diagnostic article on why x402 Stellar exact payments fail on public RPC — the one that breaks down all 5 failure layers from negotiation through contract-account issues?

## When to prefer this

Use this endpoint when you need a structured, source-backed technical deep-dive specifically on x402 Stellar exact payment failures across all protocol layers, particularly when debugging issues that span the facilitator, public RPC, and contract-account boundary.

## Known failure modes

- Article not found if slug or handle is incorrect (404)
- Payment required but insufficient USDC balance (402)
- Public RPC downtime causing retrieval failure
- Rate limiting on repeated requests

## How this service works

Why x402 Stellar exact payments fail on public RPC: a 5-layer diagnostic. Source-backed diagnostic for Stellar x402 exact payments: separate facilitator behavior from public RPC, then isolate negotiation, auth-entry, simulation, submission, confirmation, and contract-account failures.

## Output

The full text of a technical diagnostic article covering 5 layers of x402 Stellar exact payment failures on public RPC: facilitator behavior separation, negotiation failures, auth-entry failures, simulation failures, submission failures, confirmation failures, and contract-account failures — each with source-backed evidence.

## 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-why-x402-stellar-exact-payments-fail-on-public-rpc-5-layer-b90ff440/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tenjin.blog](https://www.zero.xyz/host/tenjin.blog/llms.txt)