{ "x402Version": 2, "id": 36258, "slug": "36258", "resource": "https://payee.schemasure.com/v1/guard/payee", "description": "Pre-flight a Base payment destination before you send. Verifies the EIP-55 checksum, measures distance from an address you expect — catching a mistyped digit and the shared prefix-and-suffix shape of a ground look-alike — flags the zero address, burn sinks and precompiles, refuses a token offered as its own payee, and reports whether the destination can receive the asset. Returns unknown rather than guessing when bytecode does not decide it. Not a judgement of the counterparty.", "type": "http", "serviceName": "PayeeGuard", "accepts": [ { "scheme": "exact", "network": "eip155:8453", "payTo": "0x9876af0F6D8Ed5155Cd02d1ca56D128601612690", "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "amount": "20000", "amountUsd": 0.02, "maxTimeoutSeconds": 60 } ], "outputSchema": { "properties": { "example": { "$schema": "https://json-schema.org/draft/2020-12/schema", "properties": { "data_versions": { "type": "object" }, "evidence": { "items": { "type": "object" }, "type": "array" }, "ok": { "type": "boolean" }, "policy_version": { "type": "string" }, "request_hash": { "type": "string" }, "result": { "properties": { "address": { "type": "object" }, "asset": { "type": "object" }, "can_receive": { "description": "value is true, false, or null when the bytecode does not decide it.", "type": "object" }, "checksum": { "type": "object" }, "denylist_hits": { "items": { "type": "object" }, "type": "array" }, "destination": { "type": "object" }, "expected_comparison": { "type": [ "object", "null" ] }, "self_send": { "type": "object" }, "sinks": { "type": "object" }, "unresolved": { "items": { "type": "string" }, "type": "array" } }, "type": "object" }, "risk_codes": { "items": { "type": "string" }, "type": "array" }, "verdict": { "description": "Precedence: block, then unknown, then warn, then allow.", "enum": [ "allow", "warn", "block", "unknown" ], "type": "string" }, "warnings": { "items": { "type": "string" }, "type": "array" } }, "required": [ "ok", "verdict", "result", "request_hash", "data_versions" ], "type": "object" }, "type": { "type": "string" } }, "required": [ "type" ], "type": "object" }, "extensions": { "bazaar": { "info": { "input": { "body": { "address": "0x7a3D40f7c6B18E5920Ab7C3e5d81f4A04E6F8a0D", "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "expected_address": "0x7A3D9C1b5e2F4A8d6C0b3E5F7a9D1c2b4e6f8A0d" }, "bodyType": "json", "method": "POST", "type": "http" }, "output": { "example": { "confidence": 1, "data_versions": { "chain": "eip155:8453", "denylist": "2026-08-03.1", "policy": "2026-09-19" }, "evidence": [ { "code": "EXPECTED_ADDRESS_VANITY_COLLISION", "detail": "Shares the first 4 and last 8 hex digits with the address you expected while differing throughout the middle: the signature of a ground look-alike.", "severity": "critical" } ], "ok": true, "policy_version": "2026-09-19", "request_hash": "sha256:3f9a…c104", "result": { "address": { "canonical": "0x7a3D40f7c6B18E5920Ab7C3e5d81f4A04E6F8a0D", "input": "0x7a3D40f7c6B18E5920Ab7C3e5d81f4A04E6F8a0D" }, "asset": { "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "exists": null, "kind": "erc20", "symbol": null }, "can_receive": { "basis": "erc20-balance-mapping", "value": true }, "checksum": { "form": "mixed", "valid": true }, "denylist_hits": [], "destination": { "account_kind": "unknown", "is_contract": null }, "expected_comparison": { "edit_distance": 25, "hamming_distance": 26, "match": "vanity_collision", "shared_prefix": 4, "shared_suffix": 8 }, "self_send": { "matches": null, "present": false }, "sinks": { "is_burn_address": false, "is_precompile": false, "is_zero_address": false }, "unresolved": [ "whether the asset is a deployed contract" ] }, "risk_codes": [ "EXPECTED_ADDRESS_VANITY_COLLISION", "ASSET_EXISTENCE_UNKNOWN" ], "verdict": "block", "warnings": [] }, "type": "json" } }, "schema": { "$schema": "https://json-schema.org/draft/2020-12/schema", "properties": { "input": { "additionalProperties": false, "properties": { "body": { "$schema": "https://json-schema.org/draft/2020-12/schema", "additionalProperties": false, "properties": { "address": { "description": "The destination you are about to send to. Send it exactly as you hold it, casing included: the casing is the checksum, and normalising it before you ask destroys the evidence this endpoint checks.", "pattern": "^0[xX][0-9a-fA-F]{40}$", "type": "string" }, "asset": { "default": "native", "description": "\"native\" for ETH, or an ERC-20 contract address. Defaults to \"native\". The asset decides which receivability question is asked, and they have different answers.", "type": "string" }, "expected_address": { "description": "The address you believe the destination should be. Supplying it enables the comparison checks: exact match, case-only difference, small edit distance, and the shared prefix-and-suffix shape of a ground look-alike.", "pattern": "^0[xX][0-9a-fA-F]{40}$", "type": "string" }, "from": { "description": "The sender, when you have one. Enables the self-send check.", "pattern": "^0[xX][0-9a-fA-F]{40}$", "type": "string" } }, "required": [ "address" ], "title": "PayeeGuardRequest", "type": "object" }, "bodyType": { "enum": [ "json", "form-data", "text" ], "type": "string" }, "method": { "enum": [ "POST" ], "type": "string" }, "type": { "const": "http", "type": "string" } }, "required": [ "type", "method", "bodyType", "body" ], "type": "object" }, "output": { "properties": { "example": { "$schema": "https://json-schema.org/draft/2020-12/schema", "properties": { "data_versions": { "type": "object" }, "evidence": { "items": { "type": "object" }, "type": "array" }, "ok": { "type": "boolean" }, "policy_version": { "type": "string" }, "request_hash": { "type": "string" }, "result": { "properties": { "address": { "type": "object" }, "asset": { "type": "object" }, "can_receive": { "description": "value is true, false, or null when the bytecode does not decide it.", "type": "object" }, "checksum": { "type": "object" }, "denylist_hits": { "items": { "type": "object" }, "type": "array" }, "destination": { "type": "object" }, "expected_comparison": { "type": [ "object", "null" ] }, "self_send": { "type": "object" }, "sinks": { "type": "object" }, "unresolved": { "items": { "type": "string" }, "type": "array" } }, "type": "object" }, "risk_codes": { "items": { "type": "string" }, "type": "array" }, "verdict": { "description": "Precedence: block, then unknown, then warn, then allow.", "enum": [ "allow", "warn", "block", "unknown" ], "type": "string" }, "warnings": { "items": { "type": "string" }, "type": "array" } }, "required": [ "ok", "verdict", "result", "request_hash", "data_versions" ], "type": "object" }, "type": { "type": "string" } }, "required": [ "type" ], "type": "object" } }, "required": [ "input" ], "type": "object" } } }, "tags": [ "base", "payments", "address", "checksum", "eip55", "bazaar" ], "sourceHost": "payee.schemasure.com", "lastUpdated": "2026-10-11T07:38:06.625Z", "quality": { "calls30d": 28, "uniquePayers30d": 3, "lastCalledAt": "2026-10-11T07:38:06.381Z" }, "metadata": { "serviceName": "PayeeGuard", "extensions": { "bazaar": { "info": { "input": { "body": { "address": "0x7a3D40f7c6B18E5920Ab7C3e5d81f4A04E6F8a0D", "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "expected_address": "0x7A3D9C1b5e2F4A8d6C0b3E5F7a9D1c2b4e6f8A0d" }, "bodyType": "json", "method": "POST", "type": "http" }, "output": { "example": { "confidence": 1, "data_versions": { "chain": "eip155:8453", "denylist": "2026-08-03.1", "policy": "2026-09-19" }, "evidence": [ { "code": "EXPECTED_ADDRESS_VANITY_COLLISION", "detail": "Shares the first 4 and last 8 hex digits with the address you expected while differing throughout the middle: the signature of a ground look-alike.", "severity": "critical" } ], "ok": true, "policy_version": "2026-09-19", "request_hash": "sha256:3f9a…c104", "result": { "address": { "canonical": "0x7a3D40f7c6B18E5920Ab7C3e5d81f4A04E6F8a0D", "input": "0x7a3D40f7c6B18E5920Ab7C3e5d81f4A04E6F8a0D" }, "asset": { "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "exists": null, "kind": "erc20", "symbol": null }, "can_receive": { "basis": "erc20-balance-mapping", "value": true }, "checksum": { "form": "mixed", "valid": true }, "denylist_hits": [], "destination": { "account_kind": "unknown", "is_contract": null }, "expected_comparison": { "edit_distance": 25, "hamming_distance": 26, "match": "vanity_collision", "shared_prefix": 4, "shared_suffix": 8 }, "self_send": { "matches": null, "present": false }, "sinks": { "is_burn_address": false, "is_precompile": false, "is_zero_address": false }, "unresolved": [ "whether the asset is a deployed contract" ] }, "risk_codes": [ "EXPECTED_ADDRESS_VANITY_COLLISION", "ASSET_EXISTENCE_UNKNOWN" ], "verdict": "block", "warnings": [] }, "type": "json" } }, "schema": { "$schema": "https://json-schema.org/draft/2020-12/schema", "properties": { "input": { "additionalProperties": false, "properties": { "body": { "$schema": "https://json-schema.org/draft/2020-12/schema", "additionalProperties": false, "properties": { "address": { "description": "The destination you are about to send to. Send it exactly as you hold it, casing included: the casing is the checksum, and normalising it before you ask destroys the evidence this endpoint checks.", "pattern": "^0[xX][0-9a-fA-F]{40}$", "type": "string" }, "asset": { "default": "native", "description": "\"native\" for ETH, or an ERC-20 contract address. Defaults to \"native\". The asset decides which receivability question is asked, and they have different answers.", "type": "string" }, "expected_address": { "description": "The address you believe the destination should be. Supplying it enables the comparison checks: exact match, case-only difference, small edit distance, and the shared prefix-and-suffix shape of a ground look-alike.", "pattern": "^0[xX][0-9a-fA-F]{40}$", "type": "string" }, "from": { "description": "The sender, when you have one. Enables the self-send check.", "pattern": "^0[xX][0-9a-fA-F]{40}$", "type": "string" } }, "required": [ "address" ], "title": "PayeeGuardRequest", "type": "object" }, "bodyType": { "enum": [ "json", "form-data", "text" ], "type": "string" }, "method": { "enum": [ "POST" ], "type": "string" }, "type": { "const": "http", "type": "string" } }, "required": [ "type", "method", "bodyType", "body" ], "type": "object" }, "output": { "properties": { "example": { "$schema": "https://json-schema.org/draft/2020-12/schema", "properties": { "data_versions": { "type": "object" }, "evidence": { "items": { "type": "object" }, "type": "array" }, "ok": { "type": "boolean" }, "policy_version": { "type": "string" }, "request_hash": { "type": "string" }, "result": { "properties": { "address": { "type": "object" }, "asset": { "type": "object" }, "can_receive": { "description": "value is true, false, or null when the bytecode does not decide it.", "type": "object" }, "checksum": { "type": "object" }, "denylist_hits": { "items": { "type": "object" }, "type": "array" }, "destination": { "type": "object" }, "expected_comparison": { "type": [ "object", "null" ] }, "self_send": { "type": "object" }, "sinks": { "type": "object" }, "unresolved": { "items": { "type": "string" }, "type": "array" } }, "type": "object" }, "risk_codes": { "items": { "type": "string" }, "type": "array" }, "verdict": { "description": "Precedence: block, then unknown, then warn, then allow.", "enum": [ "allow", "warn", "block", "unknown" ], "type": "string" }, "warnings": { "items": { "type": "string" }, "type": "array" } }, "required": [ "ok", "verdict", "result", "request_hash", "data_versions" ], "type": "object" }, "type": { "type": "string" } }, "required": [ "type" ], "type": "object" } }, "required": [ "input" ], "type": "object" } } } }, "liveness": { "reliability": null }, "verified": false, "featured": false, "provider": { "host": "payee.schemasure.com", "manifest_name": "payee.schemasure.com", "source": "cdp-mirror", "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources", "submitted_at": "2026-10-13T15:56:53.641Z" }, "exampleResponse": { "example": { "data_versions": {}, "evidence": [ {} ], "ok": true, "policy_version": "string", "request_hash": "string", "result": { "address": {}, "asset": {}, "can_receive": {}, "checksum": {}, "denylist_hits": [ {} ], "destination": {}, "expected_comparison": {}, "self_send": {}, "sinks": {}, "unresolved": [ "string" ] }, "risk_codes": [ "string" ], "verdict": "allow", "warnings": [ "string" ] }, "type": "string" } }