# Blockchain.info Solana Block Transactions API

> Blockchain.info Solana Block Transactions API is a paid API for AI agents from api.blockchain.info, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-02).

Retrieves a paginated list of transactions within a specific Solana block, sortable by index or fee

## Facts

- Endpoint: POST https://api.blockchain.info/explorer-gateway-kt/x402/sol/block/transactions?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/blockchain-info-solana-block-transactions-api-d1159126
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pCIRF6ZEV2HSq17uwUrtP

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 blockchain-info-solana-block-transactions-api-d1159126 -d '<json body>'
```

Example prompt: Pull the first 20 transactions from Solana block 300000000 sorted by fee in descending order using the Blockchain.com Explorer API.

## When to prefer this

Use this endpoint when you need structured, paginated access to all transactions within a specific Solana block from the Blockchain.com Explorer, especially when you want to sort by fee or block position index. Prefer this over generic RPC calls when you need clean pagination semantics (no duplicate or skipped transactions) and a predictable JSON response. Best suited for block-level analysis, auditing, or fee research on Solana.

## Known failure modes

- Invalid blockId returns a 404 or empty result
- sort=value is not supported on SOL and returns 400
- limit above 50 is rejected as out of range
- Missing or invalid network parameter may cause a 400 error
- Payment failure or insufficient USDC balance blocks the request via x402
- Very large offsets beyond total transaction count return empty pages silently

## How this service works

Paid AI-agent access to Blockchain.com Explorer API

## Output

Returns a paginated list of transactions for the specified Solana block, including transaction identifiers, fees, and block position indices. Results respect the requested sort field (index or fees), order (asc/desc), limit (up to 50), and offset. An offset beyond the total transaction count returns an empty page rather than an error.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "sort": {
   "enum": [
    "index",
    "fees"
   ],
   "type": "string",
   "default": "index",
   "description": "`index` orders by position in the block, `fees` by `fee`. Ties always fall back to block position, so paging can neither duplicate nor skip a transaction. `sort=value` is not supported on SOL and returns 400.\n"
  },
  "limit": {
   "type": "integer",
   "default": 15,
   "maximum": 50,
   "minimum": 1,
   "description": "Page size (capped at 50)"
  },
  "order": {
   "enum": [
    "asc",
    "desc"
   ],
   "type": "string",
   "default": "asc"
  },
  "offset": {
   "type": "integer",
   "default": 0,
   "minimum": 0,
   "description": "Offset into the sorted transaction list. An offset beyond `total` returns an empty page, not an error."
  },
  "blockId": {
   "type": "integer",
   "format": "int64"
  },
  "network": {
   "type": "string",
   "example": "SOL"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "format": "application/json"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/blockchain-info-solana-block-transactions-api-d1159126/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.blockchain.info](https://www.zero.xyz/host/api.blockchain.info/llms.txt)