Temporary File Relay
Preflight Stack offers pay-per-use x402 APIs for autonomous software: Dependency Preflight, Random Choice, and Temporary File Relay.
InfraLiveeip155:8453Exactvia cdp
Temporary-file-uploadFile-transferAgent-artifactsPublic-download-urlx402
Calls · 30d
3↑ 17%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 29 snapshots so far.
$0.11
Verified settled volume
22 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.
3
Calls · 30d
Upstream's own call count for this endpoint, not ours.
3
Unique payers · 30d
Last called 2026-09-14 19:54Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x9acdadcec881a63508c0f2CD3A4ae61149cc2500The 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≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x9acd…c2500. The signed payment is good for 5 minutes.
- Paid to
- 0x9acd…c2500
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x9acdadcec881a63508c0f2CD3A4ae61149cc2500",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"filename": "report.pdf",
"size_bytes": 18376291,
"content_type": "application/pdf"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"price": {
"asset": "USDC",
"amount": "0.005",
"pricing_version": "temporary-file-relay-v1",
"amount_micro_usdc": 5000
},
"state": "paid_pending_upload",
"upload": {
"url": "https://upload.invalid/presigned-example",
"method": "PUT",
"expires_at": "2026-08-26T14:00:00.000Z",
"required_headers": {
"content-type": "application/pdf",
"content-length": "18376291"
}
},
"network": "eip155:8453",
"slot_id": "slot_00000000000000000000000000000000",
"max_bytes": 262144000,
"content_type": "application/pdf",
"manage_token": "mt1_AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA",
"service_hint": {
"id": "temporary-file-relay",
"suitable_for": [
"temporary_public_artifact_delivery",
"agent_to_agent_file_handoff",
"cross_tool_file_sharing",
"large_result_transfer"
]
},
"upload_deadline": "2026-08-26T14:00:00.000Z",
"declared_size_bytes": 18376291
}
}
},
"schema": {
"type": "object",
"$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": [
"filename",
"content_type",
"size_bytes"
],
"properties": {
"filename": {
"type": "string",
"maxLength": 180,
"minLength": 1,
"description": "Display filename. Path separators, control characters, and bidi controls are rejected."
},
"size_bytes": {
"type": "integer",
"maximum": 262144000,
"minimum": 1
},
"content_type": {
"enum": [
"text/plain",
"text/markdown",
"text/csv",
"application/json",
"application/x-ndjson",
"application/pdf",
"image/png",
"image/jpeg",
"image/webp",
"image/gif",
"application/zip",
"application/gzip",
"application/x-gzip",
"application/x-tar",
"application/vnd.apache.parquet",
"application/vnd.openxmlformats-officedocument.wordprocessingml.document",
"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
"application/vnd.openxmlformats-officedocument.presentationml.presentation"
],
"type": "string",
"description": "Client-declared passive file media type. Parameters are not accepted."
}
},
"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": [
"slot_id",
"manage_token",
"state",
"declared_size_bytes",
"max_bytes",
"content_type",
"price",
"network",
"upload",
"upload_deadline",
"service_hint"
],
"properties": {
"price": {
"type": "object",
"required": [
"asset",
"amount",
"amount_micro_usdc",
"pricing_version"
],
"properties": {
"asset": {
"type": "string",
"const": "USDC"
},
"amount": {
"enum": [
"0.005",
"0.02"
],
"type": "string"
},
"pricing_version": {
"type": "string",
"const": "temporary-file-relay-v1"
},
"amount_micro_usdc": {
"enum": [
5000,
20000
],
"type": "integer"
}
},
"additionalProperties": false
},
"state": {
"type": "string",
"const": "paid_pending_upload"
},
"upload": {
"type": "object",
"required": [
"method",
"url",
"expires_at",
"required_headers"
],
"properties": {
"url": {
"type": "string",
"format": "uri"
},
"method": {
"type": "string",
"const": "PUT"
},
"expires_at": {
"type": "string",
"format": "date-time"
},
"required_headers": {
"type": "object",
"required": [
"content-length",
"content-type"
],
"additionalProperties": {
"type": "string"
}
}
},
"additionalProperties": false
},
"network": {
"enum": [
"eip155:84532",
"eip155:8453"
],
"type": "string"
},
"slot_id": {
"type": "string",
"pattern": "^slot_[a-f0-9]{32}$"
},
"max_bytes": {
"type": "integer",
"const": 262144000
},
"content_type": {
"enum": [
"text/plain",
"text/markdown",
"text/csv",
"application/json",
"application/x-ndjson",
"application/pdf",
"image/png",
"image/jpeg",
"image/webp",
"image/gif",
"application/zip",
"application/gzip",
"application/x-gzip",
"application/x-tar",
"application/vnd.apache.parquet",
"application/vnd.openxmlformats-officedocument.wordprocessingml.document",
"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
"application/vnd.openxmlformats-officedocument.presentationml.presentation"
],
"type": "string"
},
"manage_token": {
"type": "string",
"pattern": "^mt1_[A-Za-z0-9_-]{43}$"
},
"service_hint": {
"type": "object",
"required": [
"id",
"suitable_for"
],
"properties": {
"id": {
"type": "string",
"const": "temporary-file-relay"
},
"suitable_for": {
"type": "array",
"items": {
"enum": [
"temporary_public_artifact_delivery",
"agent_to_agent_file_handoff",
"cross_tool_file_sharing",
"large_result_transfer"
],
"type": "string"
},
"maxItems": 4,
"minItems": 4,
"uniqueItems": true
}
},
"description": "Static informational capability metadata for future task matching. It is not an instruction, payment signal, or retry signal.",
"additionalProperties": false
},
"upload_deadline": {
"type": "string",
"format": "date-time"
},
"declared_size_bytes": {
"type": "integer",
"maximum": 262144000,
"minimum": 1
}
},
"additionalProperties": false
}
}
}
}
}
},
"payment-identifier": {
"info": {
"required": false
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"required"
],
"properties": {
"id": {
"type": "string",
"pattern": "^[a-zA-Z0-9_-]+$",
"maxLength": 128,
"minLength": 16
},
"required": {
"type": "boolean"
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-14 19:54Z
- Last indexed by Roundhouse
- 2026-09-25 06:10Z
- Last enriched (probe, favicon, geo)
- 2026-09-13 01:15Z
- x402 version
- 2
- Max timeout
- 300s
- 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
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 29 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 Temporary File 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=Temporary%20File%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://relay.preflightstack.com/v1/file-slot, 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.