Transaction precheck: simulated balance changes, programs or contracts, approval...
https://x402.ochinimus.app/api/tx-precheckOverview
Transaction precheck: simulated balance changes, programs or contracts, approvals, new accounts, token-risk reads and warnings. Use when you need to answer: What would this Solana or Base transaction do to the wallet that signs it, before it is signed? 503 if it cannot simulate: not charged.
Protocol
x402
Price
$0.05
Payment Asset
USDC
Payment Network
Solana, Base, Polygon, Arbitrum, Arc +3 more
Category
crypto/transactions
Provider
AgentFeed
Source
bazaar
Indexed
2026-11-01 21:11:29
Health
Status
unknown
Latency (p50)
—
Uptime (30d)
—
Reliability Score
—
Last Checked
Never
Last Healthy
Never
Consecutive Failures
0
x402 Payment Validation
Payment Requirements
—
Asset Verified
—
Facilitator
—
Input Schema
{
"method": "GET",
"queryParams": {
"chain": "base",
"data": "0x095ea7b30000000000000000000000006ff5693b99212da76ad316178a184ab56d299b4300000000000000000000000000000000000000000000000000000000000f4240",
"from": "0xe3478b0bb1a5084567c319096437924948be1964",
"to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"value": "0"
},
"type": "http"
}
Output Schema
{
"example": {
"data": {
"approvals": [],
"as_of": {
"at": "2026-11-01T12:00:00.…",
"simulation_slot": 464000000,
"state_before_slot": 464000000
},
"balance_changes": [
{
"account": "FdTRycVyzq3tJtBWWMoG…",
"after": "1499995000",
"after_ui": "1.499995",
"asset": "SOL",
"before": "1500000000",
"before_ui": "1.5",
"decimals": 9,
"delta": "-5000",
"delta_ui": "-0.000005",
"includes_fee": true,
"is_signer": true,
"name": "Solana",
"symbol": "SOL"
}
],
"chain": "solana",
"closed_accounts": [],
"delegations": [
{
"amount": "18446744073709551615",
"amount_ui": "18446744073709.55161…",
"delegate": "FS9dqDgKt3KfH9HgKkZD…",
"delegate_known": false,
"kind": "spl_delegate",
"mint": "EPjFWdd5AufqSSqeM2qN…",
"owner": "FdTRycVyzq3tJtBWWMoG…",
"source": "instruction",
"token_account": "6WN5CEA7Si5NZzqHHfoE…",
"unlimited": true
}
],
"new_accounts": [],
"programs": [
{
"address": "TokenkegQfeZyiNwAJbN…",
"invoked_by": "instruction",
"known": true,
"name": "spl-token",
"source": "https://github.com/s…"
}
],
"request": {
"account_count": 4,
"fee_payer": "FdTRycVyzq3tJtBWWMoG…",
"instruction_count": 1,
"lookup_tables": [],
"signatures_in_transaction": 1,
"signers": [
"FdTRycVyzq3tJtBWWMoG…"
],
"size_bytes": 215,
"transaction_version": "legacy"
},
"simulation": {
"error": null,
"error_raw": null,
"fee_lamports": 5000,
"logs": [
"Program TokenkegQfeZ…",
"Program log: Instruc…",
"Program TokenkegQfeZ…",
"Program TokenkegQfeZ…"
],
"logs_truncated": false,
"method": "simulateTransaction…",
"ok": true,
"slot": 464000000,
"units_consumed": 2904
},
"summary": {
"highest_severity": "high",
"note": "each warning states…",
"warning_count": 2
},
"tokens": [
{
"known": true,
"mint": "EPjFWdd5AufqSSqeM2qN…",
"name": "USD Coin",
"symbol": "USDC",
"token_risk": {
"skipped": "well-known token (is…",
"source": "https://developers.c…"
}
}
],
"warnings": [
{
"amount": "18446744073709551615",
"asset": "EPjFWdd5AufqSSqeM2qN…",
"id": "unlimited_approval",
"message": "This transaction gra…",
"owner": "FdTRycVyzq3tJtBWWMoG…",
"severity": "high",
"spender": "FS9dqDgKt3KfH9HgKkZD…",
"token_account": "6WN5CEA7Si5NZzqHHfoE…",
"unlimited": true
}
]
},
"paid": true,
"tool": "get_tx_precheck"
},
"type": "json"
}