fx8y7fhv.nx.link
No description published for this endpoint.
OtherLiveeip155:8453Exactvia facilitator:thirdweb
Activity
—
Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record.
—
Verified settled volume
0 settlements proven x402 by their on-chain EIP-3009 marker.
$0.00
Listed price
As published in the catalog. Always read the live 402 before paying.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x199b4cb1B72d8B3eBba077931E10AfB0a25Fa4C5The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.100004USDC≈ $ USD
on Base · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- 0x199b…Fa4C5
- USD Coin contract
- 0x8335…02913
- Payment window
- 24 hours
- Buys
- ActionProof API https://sourceproof-production.up.railway.app - POST Use immediately before an AI agent sends email, refunds a payment, changes CRM or access data, deploys code, or performs a bulk or destructive write. Supply the human-authorized intent, exact operation and arguments, optional JSON Schema and current/proposed state, declared effects, and policy. Returns allow, deny, or requires_approval with a redacted diff, risk flags, approval packet, and short-lived receipt bound to the exact action hash. Never send credentials.
- Returns
- application/json
The catalog’s raw entry
[
{
"asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"payTo": "0x199b4cb1B72d8B3eBba077931E10AfB0a25Fa4C5",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://fx8y7fhv.nx.link/v1/action-proof/preflight",
"description": "ActionProof API https://sourceproof-production.up.railway.app - POST Use immediately before an AI agent sends email, refunds a payment, changes CRM or access data, deploys code, or performs a bulk or destructive write. Supply the human-authorized intent, exact operation and arguments, optional JSON Schema and current/proposed state, declared effects, and policy. Returns allow, deny, or requires_approval with a redacted diff, risk flags, approval packet, and short-lived receipt bound to the exact action hash. Never send credentials.",
"outputSchema": {
"responses": {
"200": {
"content": {
"application/json": {
"schema": {
"type": "object",
"title": "ActionPreflightResponse",
"required": [
"request_id",
"preflight_id",
"generated_at",
"decision",
"action_hash",
"request_hash",
"predicted_changes",
"schema_errors",
"risk_flags",
"semantic_assessment",
"receipt",
"model",
"usage"
],
"properties": {
"model": {
"type": "string",
"title": "Model"
},
"usage": {
"type": "object",
"title": "TokenUsage",
"properties": {
"input_tokens": {
"type": "integer",
"title": "Input Tokens",
"default": 0
},
"total_tokens": {
"type": "integer",
"title": "Total Tokens",
"default": 0
},
"output_tokens": {
"type": "integer",
"title": "Output Tokens",
"default": 0
}
},
"additionalProperties": false
},
"receipt": {
"type": "object",
"title": "ActionReceipt",
"required": [
"receipt_id",
"receipt_token",
"algorithm",
"issued_at",
"expires_at",
"action_hash",
"request_hash",
"decision"
],
"properties": {
"decision": {
"enum": [
"allow",
"deny",
"requires_approval"
],
"type": "string",
"title": "ActionDecision"
},
"algorithm": {
"type": "string",
"const": "HS256",
"title": "Algorithm"
},
"issued_at": {
"type": "string",
"title": "Issued At",
"format": "date-time"
},
"expires_at": {
"type": "string",
"title": "Expires At",
"format": "date-time"
},
"receipt_id": {
"type": "string",
"title": "Receipt Id"
},
"action_hash": {
"type": "string",
"title": "Action Hash"
},
"request_hash": {
"type": "string",
"title": "Request Hash"
},
"receipt_token": {
"type": "string",
"title": "Receipt Token"
}
},
"additionalProperties": false
},
"decision": {
"enum": [
"allow",
"deny",
"requires_approval"
],
"type": "string",
"title": "ActionDecision"
},
"warnings": {
"type": "array",
"items": {
"type": "string"
},
"title": "Warnings"
},
"disclaimer": {
"type": "string",
"title": "Disclaimer",
"default": "ActionProof evaluates only the supplied intent, policy, schema, state, and payload. It does not authenticate the actor, inspect the live target system, execute the action, or replace the target system's authorization controls."
},
"request_id": {
"type": "string",
"title": "Request Id"
},
"risk_flags": {
"type": "array",
"items": {
"type": "object",
"title": "ActionRiskFlag",
"required": [
"code",
"severity",
"source",
"message"
],
"properties": {
"code": {
"enum": [
"schema_violation",
"destructive_change",
"external_communication",
"financial_transaction",
"permission_change",
"deployment_change",
"bulk_operation",
"sensitive_data",
"secret_material",
"protected_field",
"recipient_restriction",
"operation_not_allowed",
"budget_exceeded",
"amount_exceeded",
"resource_limit_exceeded",
"duplicate_action",
"semantic_mismatch",
"ambiguous_intent",
"prompt_injection_content",
"unverified_effect"
],
"type": "string",
"title": "ActionRisk"
},
"source": {
"enum": [
"deterministic",
"semantic"
],
"type": "string",
"title": "ActionRiskSource"
},
"message": {
"type": "string",
"title": "Message"
},
"severity": {
"enum": [
"low",
"medium",
"high",
"critical"
],
"type": "string",
"title": "ActionRiskSeverity"
},
"json_pointers": {
"type": "array",
"items": {
"type": "string"
},
"title": "Json Pointers"
}
},
"additionalProperties": false
},
"title": "Risk Flags"
},
"action_hash": {
"type": "string",
"title": "Action Hash"
},
"generated_at": {
"type": "string",
"title": "Generated At",
"format": "date-time"
},
"preflight_id": {
"type": "string",
"title": "Preflight Id"
},
"request_hash": {
"type": "string",
"title": "Request Hash"
},
"schema_errors": {
"type": "array",
"items": {
"type": "object",
"title": "ActionSchemaError",
"required": [
"path",
"message"
],
"properties": {
"path": {
"type": "string",
"title": "Path"
},
"message": {
"type": "string",
"title": "Message"
},
"validator": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Validator"
}
},
"additionalProperties": false
},
"title": "Schema Errors"
},
"approval_packet": {
"anyOf": [
{
"type": "object",
"title": "ActionApprovalPacket",
"required": [
"summary",
"reason_codes",
"action_hash",
"expires_at"
],
"properties": {
"summary": {
"type": "string",
"title": "Summary"
},
"expires_at": {
"type": "string",
"title": "Expires At",
"format": "date-time"
},
"action_hash": {
"type": "string",
"title": "Action Hash"
},
"reason_codes": {
"type": "array",
"items": {
"enum": [
"schema_violation",
"destructive_change",
"external_communication",
"financial_transaction",
"permission_change",
"deployment_change",
"bulk_operation",
"sensitive_data",
"secret_material",
"protected_field",
"recipient_restriction",
"operation_not_allowed",
"budget_exceeded",
"amount_exceeded",
"resource_limit_exceeded",
"duplicate_action",
"semantic_mismatch",
"ambiguous_intent",
"prompt_injection_content",
"unverified_effect"
],
"type": "string",
"title": "ActionRisk"
},
"title": "Reason Codes"
}
},
"additionalProperties": false
},
{
"type": "null"
}
]
},
"predicted_changes": {
"type": "array",
"items": {
"type": "object",
"title": "PredictedStateChange",
"required": [
"path",
"change_type"
],
"properties": {
"path": {
"type": "string",
"title": "Path"
},
"after": {
"anyOf": [
{},
{
"type": "null"
}
],
"title": "After"
},
"before": {
"anyOf": [
{},
{
"type": "null"
}
],
"title": "Before"
},
"sensitive": {
"type": "boolean",
"title": "Sensitive",
"default": false
},
"change_type": {
"enum": [
"added",
"removed",
"modified"
],
"type": "string",
"title": "StateChangeType"
}
},
"additionalProperties": false
},
"title": "Predicted Changes"
},
"semantic_assessment": {
"type": "object",
"title": "ActionSemanticAssessment",
"required": [
"alignment",
"confidence",
"rationale"
],
"properties": {
"alignment": {
"enum": [
"aligned",
"misaligned",
"ambiguous",
"not_checked"
],
"type": "string",
"title": "SemanticAlignment"
},
"rationale": {
"type": "string",
"title": "Rationale"
},
"confidence": {
"type": "number",
"title": "Confidence",
"maximum": 1,
"minimum": 0
},
"discrepancies": {
"type": "array",
"items": {
"type": "object",
"title": "ModelActionDiscrepancy",
"required": [
"description"
],
"properties": {
"description": {
"type": "string",
"title": "Description",
"maxLength": 800,
"minLength": 1
},
"json_pointer": {
"anyOf": [
{
"type": "string",
"maxLength": 500
},
{
"type": "null"
}
],
"title": "Json Pointer"
}
},
"additionalProperties": false
},
"title": "Discrepancies"
},
"recommended_changes": {
"type": "array",
"items": {
"type": "string"
},
"title": "Recommended Changes"
}
},
"additionalProperties": false
}
},
"additionalProperties": false
}
}
},
"description": "Successful Response"
},
"422": {
"content": {
"application/json": {
"schema": {
"type": "object",
"title": "HTTPValidationError",
"properties": {
"detail": {
"type": "array",
"items": {
"type": "object",
"title": "ValidationError",
"required": [
"loc",
"msg",
"type"
],
"properties": {
"ctx": {
"type": "object",
"title": "Context"
},
"loc": {
"type": "array",
"items": {
"anyOf": [
{
"type": "string"
},
{
"type": "integer"
}
]
},
"title": "Location"
},
"msg": {
"type": "string",
"title": "Message"
},
"type": {
"type": "string",
"title": "Error Type"
},
"input": {
"title": "Input"
}
}
},
"title": "Detail"
}
}
}
}
},
"description": "Validation Error"
}
},
"parameters": [
{
"in": "header",
"name": "Idempotency-Key",
"schema": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Idempotency-Key"
},
"required": false
}
],
"requestBody": {
"content": {
"application/json": {
"schema": {
"type": "object",
"title": "ActionPreflightRequest",
"required": [
"intent",
"action"
],
"properties": {
"action": {
"type": "object",
"title": "ActionDescriptor",
"required": [
"operation_id"
],
"properties": {
"method": {
"anyOf": [
{
"enum": [
"GET",
"POST",
"PUT",
"PATCH",
"DELETE"
],
"type": "string",
"title": "ActionHttpMethod"
},
{
"type": "null"
}
],
"description": "HTTP method when the target action maps to an HTTP operation."
},
"system": {
"enum": [
"generic",
"email",
"payments",
"commerce",
"crm",
"access_control",
"data_store",
"deployment",
"other"
],
"type": "string",
"title": "ActionSystem",
"default": "generic",
"description": "Target system profile used for deterministic risk classification."
},
"arguments": {
"type": "object",
"title": "Arguments",
"description": "Exact target action arguments. Never include passwords, access tokens, private keys, or authorization headers.",
"additionalProperties": true
},
"resource_id": {
"anyOf": [
{
"type": "string",
"maxLength": 300,
"minLength": 1
},
{
"type": "null"
}
],
"title": "Resource Id"
},
"operation_id": {
"type": "string",
"title": "Operation Id",
"pattern": "^[A-Za-z0-9][A-Za-z0-9._:/-]{0,159}$",
"maxLength": 160,
"minLength": 1,
"description": "Stable target tool or API operation identifier."
},
"current_state": {
"anyOf": [
{
"type": "object",
"additionalProperties": true
},
{
"type": "null"
}
],
"title": "Current State",
"description": "Optional current resource state for an exact predicted diff."
},
"resource_type": {
"anyOf": [
{
"type": "string",
"maxLength": 120,
"minLength": 1
},
{
"type": "null"
}
],
"title": "Resource Type"
},
"proposed_state": {
"anyOf": [
{
"type": "object",
"additionalProperties": true
},
{
"type": "null"
}
],
"title": "Proposed State",
"description": "Optional complete proposed resource state for an exact predicted diff."
},
"request_schema": {
"anyOf": [
{
"type": "object",
"additionalProperties": true
},
{
"type": "null"
}
],
"title": "Request Schema",
"description": "Optional JSON Schema for arguments. ActionProof validates both the schema and the proposed arguments before semantic analysis."
},
"target_idempotency_key": {
"anyOf": [
{
"type": "string",
"maxLength": 200,
"minLength": 1
},
{
"type": "null"
}
],
"title": "Target Idempotency Key",
"description": "Idempotency key that the target system—not ActionProof—will enforce. High-impact writes without one are flagged for approval."
}
},
"additionalProperties": false
},
"intent": {
"type": "string",
"title": "Intent",
"maxLength": 4000,
"minLength": 3,
"description": "The human-authorized goal the proposed action must serve."
},
"policy": {
"type": "object",
"title": "ActionPolicy",
"properties": {
"deny_risks": {
"type": "array",
"items": {
"enum": [
"schema_violation",
"destructive_change",
"external_communication",
"financial_transaction",
"permission_change",
"deployment_change",
"bulk_operation",
"sensitive_data",
"secret_material",
"protected_field",
"recipient_restriction",
"operation_not_allowed",
"budget_exceeded",
"amount_exceeded",
"resource_limit_exceeded",
"duplicate_action",
"semantic_mismatch",
"ambiguous_intent",
"prompt_injection_content",
"unverified_effect"
],
"type": "string",
"title": "ActionRisk"
},
"title": "Deny Risks",
"description": "Risk categories that cause a hard deny."
},
"constraints": {
"type": "array",
"items": {
"type": "string"
},
"title": "Constraints",
"maxItems": 30,
"description": "Short natural-language constraints checked against intent and payload."
},
"approval_risks": {
"type": "array",
"items": {
"enum": [
"schema_violation",
"destructive_change",
"external_communication",
"financial_transaction",
"permission_change",
"deployment_change",
"bulk_operation",
"sensitive_data",
"secret_material",
"protected_field",
"recipient_restriction",
"operation_not_allowed",
"budget_exceeded",
"amount_exceeded",
"resource_limit_exceeded",
"duplicate_action",
"semantic_mismatch",
"ambiguous_intent",
"prompt_injection_content",
"unverified_effect"
],
"type": "string",
"title": "ActionRisk"
},
"title": "Approval Risks",
"description": "Risk categories that require a human approval step."
},
"task_budget_usd": {
"anyOf": [
{
"type": "number",
"minimum": 0
},
{
"type": "null"
}
],
"title": "Task Budget Usd"
},
"protected_fields": {
"type": "array",
"items": {
"type": "string"
},
"title": "Protected Fields",
"maxItems": 100,
"description": "JSON Pointer or dotted field paths that the action must not modify."
},
"denied_operations": {
"type": "array",
"items": {
"type": "string"
},
"title": "Denied Operations",
"maxItems": 100,
"description": "Exact or glob-style denylist of operation IDs."
},
"allowed_operations": {
"type": "array",
"items": {
"type": "string"
},
"title": "Allowed Operations",
"maxItems": 100,
"description": "Optional exact or glob-style allowlist of operation IDs."
},
"max_monetary_amount": {
"anyOf": [
{
"type": "number",
"minimum": 0
},
{
"type": "null"
}
],
"title": "Max Monetary Amount"
},
"max_affected_resources": {
"anyOf": [
{
"type": "integer",
"minimum": 1
},
{
"type": "null"
}
],
"title": "Max Affected Resources"
},
"task_spend_to_date_usd": {
"type": "number",
"title": "Task Spend To Date Usd",
"default": 0,
"minimum": 0
},
"allowed_recipient_domains": {
"type": "array",
"items": {
"type": "string"
},
"title": "Allowed Recipient Domains",
"maxItems": 50,
"description": "Optional domain allowlist for declared external recipients."
},
"minimum_semantic_confidence": {
"type": "number",
"title": "Minimum Semantic Confidence",
"default": 0.75,
"maximum": 1,
"minimum": 0.5
}
},
"additionalProperties": false
},
"actor_id": {
"anyOf": [
{
"type": "string",
"maxLength": 200,
"minLength": 1
},
{
"type": "null"
}
],
"title": "Actor Id",
"description": "Stable privacy-preserving human or agent identifier."
},
"semantic_check": {
"type": "boolean",
"title": "Semantic Check",
"default": true,
"description": "Compare intent, constraints, and the redacted payload semantically. Hard deterministic denials skip this model call."
},
"declared_effects": {
"type": "object",
"title": "DeclaredActionEffects",
"properties": {
"currency": {
"anyOf": [
{
"type": "string",
"pattern": "^[A-Z]{3,8}$"
},
{
"type": "null"
}
],
"title": "Currency",
"description": "ISO-style currency or token symbol, such as USD or USDC."
},
"irreversible": {
"anyOf": [
{
"type": "boolean"
},
{
"type": "null"
}
],
"title": "Irreversible"
},
"monetary_amount": {
"anyOf": [
{
"type": "number",
"minimum": 0
},
{
"type": "null"
}
],
"title": "Monetary Amount"
},
"affected_resources": {
"anyOf": [
{
"type": "integer",
"maximum": 1000000,
"minimum": 1
},
{
"type": "null"
}
],
"title": "Affected Resources"
},
"external_recipients": {
"type": "array",
"items": {
"type": "string"
},
"title": "External Recipients",
"maxItems": 50
},
"data_classifications": {
"type": "array",
"items": {
"type": "string"
},
"title": "Data Classifications",
"maxItems": 20
},
"estimated_external_cost_usd": {
"anyOf": [
{
"type": "number",
"minimum": 0
},
{
"type": "null"
}
],
"title": "Estimated External Cost Usd"
}
},
"additionalProperties": false
},
"receipt_ttl_seconds": {
"type": "integer",
"title": "Receipt Ttl Seconds",
"default": 300,
"maximum": 3600,
"minimum": 30
}
},
"additionalProperties": false
}
}
},
"required": true
}
},
"maxAmountRequired": "0.100004",
"maxTimeoutSeconds": 86400
}
]Provenance
- Seen in the source catalog
- 2026-07-28 18:27Z
- Last indexed by Roundhouse
- 2026-09-24 08:45Z
- Last enriched (probe, favicon, geo)
- 2026-09-21 00:15Z
- x402 version
- 1
- Max timeout
- 86400s
- Liveness probe
- HTTP 404
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
Nothing indexed for this service or its provider yet. Not a claim that it is unused — only that we hold no record. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service fx8y7fhv.nx.link and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=fx8y7fhv.nx.link' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://fx8y7fhv.nx.link/v1/action-proof/preflight, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.