# Dual-Chain Hash Anchor (Base + Solana)

> Dual-Chain Hash Anchor (Base + Solana) is a paid API for AI agents from 1c09pdnrx1.execute-api.us-east-1.amazonaws.com, paid per call via x402, $0.005000/call, status unknown (last checked 2026-09-15).

Anchors a 32-byte hash to both Base and Solana mainnet blockchains, creating an immutable on-chain timestamp proof for $0.005 USDC.

## Facts

- Endpoint: POST https://1c09pdnrx1.execute-api.us-east-1.amazonaws.com/v1/anchor
- Price: $0.005000/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dual-chain-hash-anchor-base-solana-68c5dff9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_NU_fRDXj7SBktUtWPHgVu

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 dual-chain-hash-anchor-base-solana-68c5dff9 -d '<json body>'
```

Example prompt: Anchor this 32-byte hash — 0xabc123...def456 — to both Base and Solana mainnet so I have a permanent, dual-chain timestamp proof of it.

## When to prefer this

Choose this endpoint when you need cryptographic, immutable proof that a specific hash existed at a point in time, recorded on two independent blockchains (Base and Solana) for redundancy. Ideal for document notarization, audit trails, AI decision logging, or any workflow requiring tamper-evident timestamping at very low cost ($0.005 USDC per anchor). Prefer this over single-chain anchoring when cross-chain redundancy or multi-ecosystem verification is required.

## Known failure modes

- Invalid or malformed hash (not exactly 32 bytes) returns a 400 error
- Insufficient USDC payment causes a 402 payment required error
- Network congestion on Base or Solana may cause delayed confirmation or timeout
- Duplicate hash anchoring proceeds normally but costs the same fee each time
- RPC node failures on either chain may cause partial anchoring

## How this service works

Anchor a 32-byte hash to Base + Solana mainnet — $0.005 USDC

## Output

Returns transaction IDs on both Base and Solana mainnet confirming the hash has been anchored on-chain, along with block timestamps showing when the anchor was recorded.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "title": "DatetimeParseRequest",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "string",
   "title": "Input",
   "maxLength": 500,
   "minLength": 1,
   "description": "Freeform datetime string in any format."
  },
  "timezone": {
   "type": "string",
   "title": "Timezone",
   "default": "UTC",
   "description": "IANA tz name (e.g. 'America/New_York')."
  },
  "base_time": {
   "anyOf": [
    {
     "type": "string"
    },
    {
     "type": "null"
    }
   ],
   "title": "Base Time",
   "description": "ISO 8601 reference; defaults to now UTC."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dual-chain-hash-anchor-base-solana-68c5dff9/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 1c09pdnrx1.execute-api.us-east-1.amazonaws.com](https://www.zero.xyz/host/1c09pdnrx1.execute-api.us-east-1.amazonaws.com/llms.txt)