Blockchain Data · x402

Verify you are on real Animica mainnet, and which chain id to sign with

by animica.dev · discovered, not yet claimed by its owner · updated 2026-08-27

Not responding. This endpoint did not answer its last liveness check (2026-10-13). It may be temporarily down.

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Verify you are on real Animica mainnet, and which chain id to sign with. Animica answers that question with TWO numbers: the native chain is id 1, while the EVM compatibility facade reports 149 (eth_chainId 0x95, net_version "149"). A wallet porting Ethereum tooling signs with the wrong one. Returns both, the disagreement named, plus genesis hash, fork id, policy hash and the built-in consensus checkpoints a light client pins against. All read live. No model.

Tags: animica · bazaar · discovery

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/7508.json for the price and payment options.
Pay. Call GET https://animica.dev/x402/chain/identity. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, animica:1, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.006 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base, animica:1
Uptime: 0 of the last 1 checks answered
Calls (30d): 2 · 2 unique payers (third-party data from the public x402 Bazaar)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.006	0x5D17c40FD6b119dc6006C4Ab3C20a917FCaB2aCD	60s
exact	animica:1 animica:1	ANM	65416484954	anim1zqpsmegc0qcvzjfukm89xs0zeu3eqyyyel7kelehuszvwfarqypky2gr946ga	60s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x5D17c40FD6b119dc6006C4Ab3C20a917FCaB2aCD",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "6000",
    "amountUsd": 0.006,
    "maxTimeoutSeconds": 60
  },
  {
    "scheme": "exact",
    "network": "animica:1",
    "payTo": "anim1zqpsmegc0qcvzjfukm89xs0zeu3eqyyyel7kelehuszvwfarqypky2gr946ga",
    "asset": "ANM",
    "amount": "65416484954",
    "maxTimeoutSeconds": 60
  }
]

Schemas

Output schema (JSON Schema)

{
  "animica": {
    "catalog": "https://animica.dev/.well-known/x402",
    "content_type": "application/json",
    "currency": "USDC",
    "description": "Verify you are on real Animica mainnet, and which chain id to sign with. Animica answers that question with TWO numbers: the native chain is id 1, while the EVM compatibility facade reports 149 (eth_chainId 0x95, net_version \"149\"). A wallet porting Ethereum tooling signs with the wrong one. Returns both, the disagreement named, plus genesis hash, fork id, policy hash and the built-in consensus checkpoints a light client pins against. All read live. No model.",
    "documentation": "https://animica.dev/x402#product-chain_identity",
    "name": "Animica chain identity and replay-protection check",
    "openapi": "https://animica.dev/x402/openapi.json",
    "price": "0.006000",
    "product": "chain_identity",
    "provider": "Animica",
    "terms": {
      "amount_atomic": "6000",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "chain_id": 8453,
      "network": "eip155:8453",
      "pay_to": "0x5D17c40FD6b119dc6006C4Ab3C20a917FCaB2aCD",
      "scheme": "exact"
    },
    "x402_version": 2
  },
  "bazaar": {
    "discoverable": true,
    "info": {
      "input": {
        "body": {
          "expect_chain_id": 1,
          "expect_genesis_hash": "0xa0892158cf997c56e91d0aa12e60c36037dae34800a2b54111a8fa17ec88b7de"
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "properties": {
            "body": {
              "properties": {
                "expect_chain_id": {
                  "description": "the chain id you BELIEVE you are talking to. When given, the response carries an explicit matches_native / matches_evm_facade verdict instead of leaving you to compare two numbers yourself — which is the comparison people get wrong.",
                  "type": "integer"
                },
                "expect_genesis_hash": {
                  "description": "the genesis hash you have pinned (0x… 32 bytes). Compared byte-for-byte; a mismatch is reported as a hard failure, since it means this is not the chain you think it is.",
                  "type": "string"
                }
              },
              "type": "object"
            },
            "bodyType": {
              "enum": [
                "json"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "queryParams": {
              "properties": {
                "expect_chain_id": {
                  "description": "same as body.expect_chain_id for GET callers",
                  "type": "string"
                },
                "expect_genesis_hash": {
                  "description": "same as body.expect_genesis_hash for GET callers",
                  "type": "string"
                }
              },
              "type": "object"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {},
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  },
  "discovery": {
    "discoverable": true,
    "info": {
      "input": {
        "bodyFields": {
          "expect_chain_id": {
            "description": "the chain id you BELIEVE you are talking to. When given, the response carries an explicit matches_native / matches_evm_facade verdict instead of leaving you to compare two numbers yourself — which is the comparison people get wrong.",
            "required": false,
            "type": "integer"
          },
          "expect_genesis_hash": {
            "description": "the genesis hash you have pinned (0x… 32 bytes). Compared byte-for-byte; a mismatch is reported as a hard failure, since it means this is not the chain you think it is.",
            "required": false,
            "type": "string"
          }
        },
        "bodyType": "json",
        "method": "POST",
        "queryParams": {
          "expect_chain_id": {
            "description": "same as body.expect_chain_id for GET callers",
            "type": "string"
          },
          "expect_genesis_hash": {
            "description": "same as body.expect_genesis_hash for GET callers",
            "type": "string"
          }
        },
        "type": "http"
      },
      "output": {
        "description": "as_of {read_at, head_height, head_hash}; native {chain_id, genesis_hash, genesis_header_hash, fork_id, policy_hash}; evm_facade {eth_chain_id, eth_chain_id_decimal, net_version, agrees_with_native, why_it_matters}; checkpoints {source, count, entries[] {height, hash}}; expectation {checked, chain_id {expected, matches_native, matches_evm_facade}, genesis_hash {expected, matches}}; warnings[]; read_errors; inference {used:false}.",
        "type": "json"
      }
    }
  }
}

Example shape — generated from the schema, not a captured live response

null

Examples

curl

curl "https://animica.dev/x402/chain/identity"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://animica.dev/x402/chain/identity");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://animica.dev/x402/chain/identity")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: animica.dev
Endpoint: https://animica.dev/x402/chain/identity
Machine-readable: /resources/7508.json