4qqp2hc6.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.
$0.0000
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.
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The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
1.000183USDC≈ $ 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
- AmendmentGuard API https://sourceproof-production.up.railway.app - POST Use when an agent has original and amended government-solicitation documents and needs a citation-backed compliance delta. Detect deadline, acknowledgment, resubmission, pricing, scope, eligibility, security, evaluation, submission, and attachment changes; return exact evidence and prioritized actions.
- Returns
- application/json
The catalog’s raw entry
[
{
"asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"payTo": "0x199b4cb1B72d8B3eBba077931E10AfB0a25Fa4C5",
"scheme": "exact",
"network": "eip155:8453",
"mimeType": "application/json",
"resource": "https://4qqp2hc6.nx.link/v1/amendment-guard/reports",
"description": "AmendmentGuard API https://sourceproof-production.up.railway.app - POST Use when an agent has original and amended government-solicitation documents and needs a citation-backed compliance delta. Detect deadline, acknowledgment, resubmission, pricing, scope, eligibility, security, evaluation, submission, and attachment changes; return exact evidence and prioritized actions.",
"outputSchema": {
"responses": {
"200": {
"content": {
"application/json": {
"schema": {
"type": "object",
"title": "AmendmentGuardResponse",
"required": [
"request_id",
"report_id",
"generated_at",
"cached",
"summary",
"overall_impact",
"acknowledgment_status",
"resubmission_status",
"bidder_profile_applied",
"before_documents",
"after_documents",
"changes",
"action_items",
"severity_counts",
"category_counts",
"warnings",
"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
},
"cached": {
"type": "boolean",
"title": "Cached"
},
"changes": {
"type": "array",
"items": {
"type": "object",
"title": "AmendmentMaterialChange",
"required": [
"change_id",
"candidate_id",
"category",
"severity",
"change_type",
"title",
"explanation",
"action_required",
"confidence",
"classification_method"
],
"properties": {
"after": {
"anyOf": [
{
"type": "object",
"title": "AmendmentCitation",
"required": [
"document_id",
"evidence_id",
"locator",
"quote"
],
"properties": {
"quote": {
"type": "string",
"title": "Quote"
},
"locator": {
"type": "string",
"title": "Locator"
},
"source_url": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Source Url"
},
"document_id": {
"type": "string",
"title": "Document Id"
},
"evidence_id": {
"type": "string",
"title": "Evidence Id"
},
"source_label": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Source Label"
}
},
"additionalProperties": false
},
{
"type": "null"
}
]
},
"title": {
"type": "string",
"title": "Title"
},
"before": {
"anyOf": [
{
"type": "object",
"title": "AmendmentCitation",
"required": [
"document_id",
"evidence_id",
"locator",
"quote"
],
"properties": {
"quote": {
"type": "string",
"title": "Quote"
},
"locator": {
"type": "string",
"title": "Locator"
},
"source_url": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Source Url"
},
"document_id": {
"type": "string",
"title": "Document Id"
},
"evidence_id": {
"type": "string",
"title": "Evidence Id"
},
"source_label": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Source Label"
}
},
"additionalProperties": false
},
{
"type": "null"
}
]
},
"category": {
"enum": [
"deadline",
"submission",
"acknowledgment",
"resubmission",
"scope",
"technical",
"qualification",
"set_aside",
"evaluation",
"pricing",
"contract_terms",
"delivery",
"security",
"insurance_bonding",
"attachment",
"administrative",
"other"
],
"type": "string",
"title": "AmendmentCategory"
},
"severity": {
"enum": [
"critical",
"high",
"medium",
"low"
],
"type": "string",
"title": "AmendmentSeverity"
},
"change_id": {
"type": "string",
"title": "Change Id"
},
"confidence": {
"type": "number",
"title": "Confidence",
"maximum": 1,
"minimum": 0
},
"change_type": {
"enum": [
"added",
"removed",
"modified"
],
"type": "string",
"title": "AmendmentChangeType"
},
"explanation": {
"type": "string",
"title": "Explanation"
},
"candidate_id": {
"type": "string",
"title": "Candidate Id"
},
"bidder_impact": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Bidder Impact"
},
"action_required": {
"type": "string",
"title": "Action Required"
},
"classification_method": {
"enum": [
"ai_verified",
"deterministic_safety_net"
],
"type": "string",
"title": "AmendmentClassificationMethod"
}
},
"additionalProperties": false
},
"title": "Changes"
},
"summary": {
"type": "string",
"title": "Summary"
},
"warnings": {
"type": "array",
"items": {
"type": "object",
"title": "AmendmentGuardWarning",
"required": [
"code",
"message"
],
"properties": {
"code": {
"type": "string",
"title": "Code"
},
"message": {
"type": "string",
"title": "Message"
},
"document_id": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Document Id"
}
},
"additionalProperties": false
},
"title": "Warnings"
},
"report_id": {
"type": "string",
"title": "Report Id"
},
"disclaimer": {
"type": "string",
"title": "Disclaimer",
"default": "This report is decision support, not legal advice or a determination of bid responsiveness. A qualified reviewer should confirm the complete amended solicitation package before submission."
},
"request_id": {
"type": "string",
"title": "Request Id"
},
"action_items": {
"type": "array",
"items": {
"type": "object",
"title": "AmendmentActionItem",
"required": [
"change_id",
"urgency",
"action"
],
"properties": {
"action": {
"type": "string",
"title": "Action"
},
"urgency": {
"enum": [
"immediate",
"before_submission",
"review"
],
"type": "string",
"title": "Urgency"
},
"change_id": {
"type": "string",
"title": "Change Id"
}
},
"additionalProperties": false
},
"title": "Action Items"
},
"generated_at": {
"type": "string",
"title": "Generated At",
"format": "date-time"
},
"overall_impact": {
"anyOf": [
{
"enum": [
"critical",
"high",
"medium",
"low"
],
"type": "string",
"title": "AmendmentSeverity"
},
{
"enum": [
"none",
"unknown"
],
"type": "string"
}
],
"title": "Overall Impact"
},
"after_documents": {
"type": "array",
"items": {
"type": "object",
"title": "AmendmentDocumentMetadata",
"required": [
"document_id",
"evidence_id",
"content_type",
"sha256",
"byte_size",
"text_length"
],
"properties": {
"label": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Label"
},
"title": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Title"
},
"sha256": {
"type": "string",
"title": "Sha256"
},
"byte_size": {
"type": "integer",
"title": "Byte Size",
"minimum": 0
},
"truncated": {
"type": "boolean",
"title": "Truncated",
"default": false
},
"page_count": {
"anyOf": [
{
"type": "integer",
"minimum": 0
},
{
"type": "null"
}
],
"title": "Page Count"
},
"source_url": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Source Url"
},
"document_id": {
"type": "string",
"title": "Document Id"
},
"evidence_id": {
"type": "string",
"title": "Evidence Id"
},
"text_length": {
"type": "integer",
"title": "Text Length",
"minimum": 0
},
"content_type": {
"type": "string",
"title": "Content Type"
},
"pages_extracted": {
"anyOf": [
{
"type": "integer",
"minimum": 0
},
{
"type": "null"
}
],
"title": "Pages Extracted"
}
},
"additionalProperties": false
},
"title": "After Documents"
},
"category_counts": {
"type": "object",
"title": "Category Counts",
"additionalProperties": {
"type": "integer"
}
},
"severity_counts": {
"type": "object",
"title": "Severity Counts",
"additionalProperties": {
"type": "integer"
}
},
"before_documents": {
"type": "array",
"items": {
"type": "object",
"title": "AmendmentDocumentMetadata",
"required": [
"document_id",
"evidence_id",
"content_type",
"sha256",
"byte_size",
"text_length"
],
"properties": {
"label": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Label"
},
"title": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Title"
},
"sha256": {
"type": "string",
"title": "Sha256"
},
"byte_size": {
"type": "integer",
"title": "Byte Size",
"minimum": 0
},
"truncated": {
"type": "boolean",
"title": "Truncated",
"default": false
},
"page_count": {
"anyOf": [
{
"type": "integer",
"minimum": 0
},
{
"type": "null"
}
],
"title": "Page Count"
},
"source_url": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Source Url"
},
"document_id": {
"type": "string",
"title": "Document Id"
},
"evidence_id": {
"type": "string",
"title": "Evidence Id"
},
"text_length": {
"type": "integer",
"title": "Text Length",
"minimum": 0
},
"content_type": {
"type": "string",
"title": "Content Type"
},
"pages_extracted": {
"anyOf": [
{
"type": "integer",
"minimum": 0
},
{
"type": "null"
}
],
"title": "Pages Extracted"
}
},
"additionalProperties": false
},
"title": "Before Documents"
},
"resubmission_status": {
"enum": [
"required",
"likely",
"not_detected",
"unknown"
],
"type": "string",
"title": "AmendmentSignalStatus"
},
"solicitation_number": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
],
"title": "Solicitation Number"
},
"acknowledgment_status": {
"enum": [
"required",
"likely",
"not_detected",
"unknown"
],
"type": "string",
"title": "AmendmentSignalStatus"
},
"bidder_profile_applied": {
"type": "boolean",
"title": "Bidder Profile Applied"
}
},
"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": "AmendmentGuardRequest",
"required": [
"before_documents",
"after_documents"
],
"properties": {
"max_changes": {
"type": "integer",
"title": "Max Changes",
"default": 20,
"maximum": 30,
"minimum": 1,
"description": "Maximum number of evidence-verified changes to return."
},
"bidder_profile": {
"anyOf": [
{
"type": "object",
"title": "BidderProfile",
"properties": {
"constraints": {
"type": "array",
"items": {
"type": "string"
},
"title": "Constraints",
"maxItems": 20,
"description": "Short, non-confidential constraints that can be checked against changed requirements."
},
"naics_codes": {
"type": "array",
"items": {
"type": "string"
},
"title": "Naics Codes",
"maxItems": 20,
"description": "NAICS codes the bidder currently uses."
},
"certifications": {
"type": "array",
"items": {
"type": "string"
},
"title": "Certifications",
"maxItems": 30,
"description": "Relevant current certifications, licenses, or clearances."
},
"set_aside_eligibilities": {
"type": "array",
"items": {
"type": "string"
},
"title": "Set Aside Eligibilities",
"maxItems": 20,
"description": "Current set-aside statuses, such as small business, SDVOSB, WOSB, 8(a), or HUBZone."
}
},
"additionalProperties": false
},
{
"type": "null"
}
],
"description": "Optional structured, non-confidential bidder facts used only to flag potentially relevant impacts."
},
"after_documents": {
"type": "array",
"items": {
"type": "object",
"title": "SolicitationDocumentInput",
"required": [
"document_id"
],
"properties": {
"url": {
"anyOf": [
{
"type": "string",
"format": "uri",
"minLength": 1
},
{
"type": "null"
}
],
"title": "Url",
"description": "Public HTTP(S) URL for a PDF, DOCX, HTML, or text document. Do not put API keys or other secrets in the URL."
},
"text": {
"anyOf": [
{
"type": "string",
"maxLength": 600000,
"minLength": 1
},
{
"type": "null"
}
],
"title": "Text",
"description": "Inline extracted text when a public URL is unavailable. Do not send confidential, export-controlled, or source-selection-sensitive material."
},
"label": {
"anyOf": [
{
"type": "string",
"maxLength": 200
},
{
"type": "null"
}
],
"title": "Label",
"description": "Optional human-readable document label."
},
"document_id": {
"type": "string",
"title": "Document Id",
"pattern": "^[A-Za-z0-9][A-Za-z0-9._-]{0,79}$",
"maxLength": 80,
"minLength": 1,
"description": "Stable identifier used to match this document across package versions, for example solicitation, pricing-schedule, or attachment-j4."
}
},
"additionalProperties": false
},
"title": "After Documents",
"maxItems": 6,
"minItems": 1,
"description": "Amended solicitation package documents."
},
"before_documents": {
"type": "array",
"items": {
"type": "object",
"title": "SolicitationDocumentInput",
"required": [
"document_id"
],
"properties": {
"url": {
"anyOf": [
{
"type": "string",
"format": "uri",
"minLength": 1
},
{
"type": "null"
}
],
"title": "Url",
"description": "Public HTTP(S) URL for a PDF, DOCX, HTML, or text document. Do not put API keys or other secrets in the URL."
},
"text": {
"anyOf": [
{
"type": "string",
"maxLength": 600000,
"minLength": 1
},
{
"type": "null"
}
],
"title": "Text",
"description": "Inline extracted text when a public URL is unavailable. Do not send confidential, export-controlled, or source-selection-sensitive material."
},
"label": {
"anyOf": [
{
"type": "string",
"maxLength": 200
},
{
"type": "null"
}
],
"title": "Label",
"description": "Optional human-readable document label."
},
"document_id": {
"type": "string",
"title": "Document Id",
"pattern": "^[A-Za-z0-9][A-Za-z0-9._-]{0,79}$",
"maxLength": 80,
"minLength": 1,
"description": "Stable identifier used to match this document across package versions, for example solicitation, pricing-schedule, or attachment-j4."
}
},
"additionalProperties": false
},
"title": "Before Documents",
"maxItems": 6,
"minItems": 1,
"description": "Original solicitation package documents."
},
"solicitation_number": {
"anyOf": [
{
"type": "string",
"maxLength": 100
},
{
"type": "null"
}
],
"title": "Solicitation Number",
"description": "Optional solicitation or procurement identifier."
}
},
"additionalProperties": false
}
}
},
"required": true
}
},
"maxAmountRequired": "1.000183",
"maxTimeoutSeconds": 86400
}
]Provenance
- Seen in the source catalog
- 2026-07-28 18:24Z
- Last indexed by Roundhouse
- 2026-09-24 09:45Z
- 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 4qqp2hc6.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=4qqp2hc6.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://4qqp2hc6.nx.link/v1/amendment-guard/reports, 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.