Context Relay
Paid, compact, citation-verifiable web context for autonomous agents.
SearchLiveeip155:8453Exactvia cdp
Url-to-markdownWeb-extractionContext-compressionAi-agentCitations
Calls · 30d
2↑ 40%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$0.07
Verified settled volume
7 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
2
Unique payers · 30d
Last called 2026-09-14 19:49Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x08B11EA90aEb253eF0F954BE108A12E6783D8189The 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.
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x08B1…D8189. The signed payment is good for 5 minutes.
- Paid to
- 0x08B1…D8189
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x08B11EA90aEb253eF0F954BE108A12E6783D8189",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"url": "https://docs.cdp.coinbase.com/x402/welcome",
"question": "What is x402 designed to enable for agents and APIs?",
"max_tokens": 2000,
"max_price_usd": 0.005
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"safety": {
"robots_policy": "allowed",
"source_directives": [],
"public_source_only": true,
"shared_cache_eligible": true,
"prompt_injection_signals": []
},
"source": {
"title": "Welcome to x402",
"final_url": "https://docs.cdp.coinbase.com/x402/welcome",
"fetched_at": "2026-01-01T00:00:00.000Z",
"content_type": "text/html; charset=utf-8",
"canonical_url": "https://docs.cdp.coinbase.com/x402/welcome",
"requested_url": "https://docs.cdp.coinbase.com/x402/welcome",
"content_sha256": "0000000000000000000000000000000000000000000000000000000000000000"
},
"context": {
"markdown": "# Welcome to x402\n\n## c1 · p[2]\n\nx402 enables HTTP-native payments for APIs and agents.",
"citations": [
{
"id": "c1",
"excerpt": "x402 enables HTTP-native payments for APIs and agents.",
"locator": "p[2]",
"excerpt_sha256": "0000000000000000000000000000000000000000000000000000000000000000"
}
],
"raw_token_estimate": 1250,
"token_estimate_method": "characters_divided_by_4",
"estimated_tokens_saved": 1200,
"returned_token_estimate": 50
},
"delivery": {
"route": "public_html_direct",
"status": "delivered",
"network": "eip155:8453",
"payment": {
"protocol": "x402",
"settlement_status": "reported_in_response_header",
"verification_status": "verified",
"settlement_receipt_header": "PAYMENT-RESPONSE",
"failed_delivery_charge_policy": "not_settled_when_handler_status_is_400_or_higher"
},
"currency": "USDC",
"economics": {
"estimate_basis": "configured_route_estimate",
"estimated_gross_margin": 0.8,
"estimated_gross_profit_usd": 0.004,
"estimated_variable_cost_usd": 0.001
},
"price_usd": 0.005,
"cost_class": "fresh_static",
"latency_ms": 250,
"cache_status": "miss",
"generated_at": "2026-01-01T00:00:00.250Z"
},
"context_id": "ctx_0123456789abcdef",
"receipt_id": "rcpt_01234567-89ab-cdef-0123-456789abcdef",
"schema_version": "context-receipt.v1",
"transformation": {
"method": "deterministic_extract",
"question": "What is x402 designed to enable for agents and APIs?",
"max_tokens": 2000,
"model_used": false,
"pipeline_version": "html-deterministic.v1"
}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"bodyType",
"body"
],
"properties": {
"body": {
"type": "object",
"required": [
"url"
],
"properties": {
"url": {
"type": "string",
"format": "uri",
"maxLength": 4096,
"description": "Public HTTP or HTTPS page to retrieve."
},
"question": {
"type": "string",
"maxLength": 2000,
"description": "Optional task or question used to rank relevant passages."
},
"max_tokens": {
"type": "integer",
"default": 4000,
"maximum": 12000,
"minimum": 250
},
"max_price_usd": {
"type": "number",
"minimum": 0,
"description": "Abort before retrieval if the fixed service price exceeds this amount."
},
"freshness_seconds": {
"type": "integer",
"default": 3600,
"maximum": 86400,
"minimum": 60
}
},
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"schema_version",
"receipt_id",
"context_id",
"source",
"transformation",
"context",
"delivery",
"safety"
],
"properties": {
"safety": {
"type": "object",
"required": [
"public_source_only",
"shared_cache_eligible",
"source_directives",
"robots_policy",
"prompt_injection_signals"
],
"properties": {
"robots_policy": {
"enum": [
"allowed",
"not_present",
"unavailable_4xx"
]
},
"source_directives": {
"type": "array",
"items": {
"type": "string"
}
},
"public_source_only": {
"const": true
},
"shared_cache_eligible": {
"type": "boolean"
},
"prompt_injection_signals": {
"type": "array",
"items": {
"type": "string"
}
}
},
"additionalProperties": false
},
"source": {
"type": "object",
"required": [
"requested_url",
"canonical_url",
"final_url",
"title",
"fetched_at",
"content_type",
"content_sha256"
],
"properties": {
"title": {
"type": "string"
},
"final_url": {
"type": "string",
"format": "uri"
},
"fetched_at": {
"type": "string",
"format": "date-time"
},
"content_type": {
"type": "string"
},
"canonical_url": {
"type": "string",
"format": "uri"
},
"requested_url": {
"type": "string",
"format": "uri"
},
"content_sha256": {
"type": "string",
"pattern": "^[a-f0-9]{64}$"
}
},
"additionalProperties": false
},
"context": {
"type": "object",
"required": [
"markdown",
"citations",
"raw_token_estimate",
"returned_token_estimate",
"estimated_tokens_saved",
"token_estimate_method"
],
"properties": {
"markdown": {
"type": "string"
},
"citations": {
"type": "array",
"items": {
"type": "object",
"required": [
"id",
"locator",
"excerpt",
"excerpt_sha256"
],
"properties": {
"id": {
"type": "string"
},
"excerpt": {
"type": "string"
},
"locator": {
"type": "string"
},
"excerpt_sha256": {
"type": "string",
"pattern": "^[a-f0-9]{64}$"
}
},
"additionalProperties": false
},
"minItems": 1
},
"raw_token_estimate": {
"type": "integer",
"minimum": 1
},
"token_estimate_method": {
"const": "characters_divided_by_4"
},
"estimated_tokens_saved": {
"type": "integer",
"minimum": 0
},
"returned_token_estimate": {
"type": "integer",
"minimum": 1
}
},
"additionalProperties": false
},
"delivery": {
"type": "object",
"required": [
"status",
"route",
"cache_status",
"price_usd",
"currency",
"network",
"cost_class",
"economics",
"latency_ms",
"generated_at",
"payment"
],
"properties": {
"route": {
"enum": [
"cache",
"public_html_direct"
]
},
"status": {
"const": "delivered"
},
"network": {
"type": "string"
},
"payment": {
"type": "object",
"required": [
"protocol",
"verification_status",
"settlement_status",
"settlement_receipt_header",
"failed_delivery_charge_policy"
],
"properties": {
"protocol": {
"const": "x402"
},
"settlement_status": {
"enum": [
"reported_in_response_header",
"reported_in_mcp_meta",
"not_applicable"
]
},
"verification_status": {
"enum": [
"verified",
"internal_unverified"
]
},
"settlement_receipt_header": {
"enum": [
"PAYMENT-RESPONSE",
"x402/payment-response",
null
]
},
"failed_delivery_charge_policy": {
"const": "not_settled_when_handler_status_is_400_or_higher"
}
},
"additionalProperties": false
},
"currency": {
"const": "USDC"
},
"economics": {
"type": "object",
"required": [
"estimate_basis",
"estimated_variable_cost_usd",
"estimated_gross_profit_usd",
"estimated_gross_margin"
],
"properties": {
"estimate_basis": {
"const": "configured_route_estimate"
},
"estimated_gross_margin": {
"type": "number"
},
"estimated_gross_profit_usd": {
"type": "number"
},
"estimated_variable_cost_usd": {
"type": "number",
"minimum": 0
}
},
"additionalProperties": false
},
"price_usd": {
"type": "number",
"minimum": 0
},
"cost_class": {
"enum": [
"cached",
"fresh_static"
]
},
"latency_ms": {
"type": "integer",
"minimum": 0
},
"cache_status": {
"enum": [
"hit",
"miss"
]
},
"generated_at": {
"type": "string",
"format": "date-time"
}
},
"additionalProperties": false
},
"context_id": {
"type": "string"
},
"receipt_id": {
"type": "string"
},
"schema_version": {
"const": "context-receipt.v1"
},
"transformation": {
"type": "object",
"required": [
"pipeline_version",
"method",
"question",
"max_tokens",
"model_used"
],
"properties": {
"method": {
"const": "deterministic_extract"
},
"question": {
"type": [
"string",
"null"
]
},
"max_tokens": {
"type": "integer",
"maximum": 12000,
"minimum": 250
},
"model_used": {
"const": false
},
"pipeline_version": {
"const": "html-deterministic.v1"
}
},
"additionalProperties": false
}
},
"additionalProperties": false
}
}
}
}
},
"routeTemplate": "/api/v1/context"
}
}Provenance
- Seen in the source catalog
- 2026-09-14 19:49Z
- Last indexed by Roundhouse
- 2026-09-24 08:00Z
- Last enriched (probe, favicon, geo)
- 2026-09-20 09:45Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 405
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
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Context Relay 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=Context%20Relay' 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://context-relay.contextrelay.workers.dev/api/v1/context, 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.