# Tenjin ETH R&D Daily — EIP-8333 FFG Checkpoints Article

> Tenjin ETH R&D Daily — EIP-8333 FFG Checkpoints Article is a paid API for AI agents from tenjin.blog, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-13).

Returns the full text of a pay-per-read article summarizing EIP-8333 (FFG checkpoint migration to boundary block), EIP-8037, and consensus-spec payload-gossip updates from Ethereum R&D daily news.

## Facts

- Endpoint: GET https://tenjin.blog/api/read/eth-rd/eth-r-d-daily-eip-8333-moves-ffg-checkpoints-to-the-boundary-block
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tenjin-eth-r-d-daily-eip-8333-ffg-checkpoints-article-8e9d7414
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_fZKN-Q6P4zcyGtKAnE4D9

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-eth-r-d-daily-eip-8333-ffg-checkpoints-article-8e9d7414
```

Example prompt: Can you fetch and read me the Tenjin eth-rd article about EIP-8333 moving FFG checkpoints to the boundary block? The handle is eth-rd and the slug is eth-r-d-daily-eip-8333-moves-ffg-checkpoints-to-the-boundary-block.

## When to prefer this

Use this endpoint when you specifically need the full text of the Tenjin eth-rd daily article covering EIP-8333, EIP-8037, and related consensus-spec updates. It is ideal for AI agents that need to ingest Ethereum protocol research content paywalled under x402 micropayments, where you already know the exact creator handle and article slug.

## Known failure modes

- Payment not submitted or rejected — x402 challenge not fulfilled, article text not returned
- Invalid or mismatched slug — slug does not correspond to a published article, returns 404
- Invalid creator handle — handle 'eth-rd' not found or unclaimed, returns error
- Article not yet published or removed — slug resolves to nothing
- Network or server error — 5xx response from tenjin.blog

## How this service works

EIP-8333 merged as a Draft Core EIP, replacing first-slot FFG checkpoint roots with the last block before the epoch. EIP-8037 also picked up a 0xEF-prefix deployment-halt state-gas test, and consensus-specs clarified payload-gossip validation errors.

## Output

A JSON object containing the full text of the Tenjin article covering EIP-8333's progression to Draft Core EIP status (replacing first-slot FFG checkpoint roots with the last block before the epoch), EIP-8037's 0xEF-prefix deployment-halt state-gas test, and consensus-specs clarifications on payload-gossip validation errors. Access requires paying the x402 challenge at $0.10 USDC per call.

## 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-eth-r-d-daily-eip-8333-ffg-checkpoints-article-8e9d7414/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)