2s
Look up a protein in UniProtKB by accession (e.g. "P04637", "Q9Y6K9", "P0DTC2"). Returns the entry id, reviewed (Swiss-Prot) flag, recommended + alternative protein names, gene names, organism + taxid, sequence length and molecular weight, the curated function description, subcellular locations, Gene Ontology terms (id + term + aspect: biological_process / molecular_function / cellular_component), PDB structure ids, and keywords. Bioinformatics, structural biology, drug-target research, education. Gene-centric sibling: /api/bio/gene. CC-BY UniProt data.
SearchLiveeip155:8453Exactvia cdp
Public-recordsIdentifiersAi-agentsUs-gov-datax402
Calls · 30d
1
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 5 snapshots so far.
$15.85
Verified settled volume
A floor: summed over 5,000 of 36,082 verified settlements.
$0.0036
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-09-19 16:00Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5The 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.
Live 402 challenge
Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.
{
"error": "PAYMENT-SIGNATURE required",
"accepts": [
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5",
"amount": "3600",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"name": "USDC",
"version": "1",
"feePayer": "BENrLoUbndxoNMUS5JXApGMtNykLjFXXixMtpDwDR9SP"
},
"payTo": "TW6ntaGzvj63ZgPjszd4FCGmVTGfzv1MAYZbjYcyWhn",
"amount": "3600",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 60
}
],
"resource": {
"url": "https://2s.io/api/bio/protein",
"tags": [
"public-records",
"identifiers",
"ai-agents",
"us-gov-data",
"x402",
"upto-billing",
"ai-gateway",
"agent-infrastructure"
],
"iconUrl": "https://2s.io/icon-512.png",
"mimeType": "application/json",
"description": "Look up a protein in UniProtKB by accession (e.g. \"P04637\", \"Q9Y6K9\", \"P0DTC2\"). Returns the entry id, reviewed (Swiss-Prot) flag, recommended + alternative protein names, gene names, organism + taxid, sequence length and molecular weight, the curated function description, subcellular locations, Gene Ontology terms (id + term + aspect: biological_process / molecular_function / cellular_component), PDB structure ids, and keywords. Bioinformatics, structural biology, drug-target research, education. Gene-centric sibling: /api/bio/gene. CC-BY UniProt data.",
"serviceName": "2s"
},
"extensions": {
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"accession": "P04637"
}
},
"output": {
"type": "json",
"schema": {
"type": "object",
"properties": {
"ok": {
"type": "boolean"
},
"items": {
"type": "array",
"items": {
"type": "object",
"properties": {
"protein": {
"type": "object",
"properties": {
"genes": {
"type": "array",
"items": {
"type": "string"
}
},
"entryId": {
"type": "string"
},
"goTerms": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"term": {
"type": "string"
},
"aspect": {
"type": "string"
}
}
}
},
"function": {
"type": "string"
},
"keywords": {
"type": "array",
"items": {
"type": "string"
}
},
"lengthAa": {
"type": "integer"
},
"organism": {
"type": "object",
"properties": {
"taxid": {
"type": "integer"
},
"commonName": {
"type": "string"
},
"scientificName": {
"type": "string"
}
}
},
"reviewed": {
"type": "boolean"
},
"accession": {
"type": "string"
},
"proteinName": {
"type": "string"
},
"pdbStructures": {
"type": "array",
"items": {
"type": "string"
}
},
"molecularWeightDa": {
"type": "integer"
},
"subcellularLocations": {
"type": "array",
"items": {
"type": "string"
}
}
}
}
}
}
},
"total": {
"type": "integer"
},
"source": {
"type": "object",
"properties": {
"url": {
"type": "string"
},
"license": {
"type": "string"
},
"provider": {
"type": "string"
}
}
}
}
},
"example": {
"ok": true,
"items": [
{
"protein": {
"genes": [
"TP53"
],
"entryId": "P53_HUMAN",
"goTerms": [
{
"id": "GO:0006915",
"term": "apoptotic process",
"aspect": "biological_process"
}
],
"function": "Multifunctional transcription factor...",
"keywords": [
"Apoptosis",
"Tumor suppressor"
],
"lengthAa": 393,
"organism": {
"taxid": 9606,
"commonName": "Human",
"scientificName": "Homo sapiens"
},
"reviewed": true,
"accession": "P04637",
"proteinName": "Cellular tumor antigen p53",
"pdbStructures": [
"1A1U",
"1AIE"
],
"molecularWeightDa": 43653,
"subcellularLocations": [
"Cytoplasm",
"Nucleus"
]
}
}
],
"total": 1,
"source": {
"url": "https://www.uniprot.org/",
"license": "CC-BY 4.0 — attribute UniProt.",
"provider": "UniProt"
}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"queryParams"
],
"properties": {
"type": {
"const": "http"
},
"method": {
"const": "GET"
},
"queryParams": {
"required": [
"accession"
],
"properties": {
"accession": {
"type": "string",
"description": "UniProtKB accession, e.g. \"P04637\"."
}
}
}
}
},
"output": {
"type": "object",
"properties": {
"ok": {
"type": "boolean"
},
"items": {
"type": "array",
"items": {
"type": "object",
"properties": {
"protein": {
"type": "object",
"properties": {
"genes": {
"type": "array",
"items": {
"type": "string"
}
},
"entryId": {
"type": "string"
},
"goTerms": {
"type": "array",
"items": {
"type": "object",
"properties": {
"id": {
"type": "string"
},
"term": {
"type": "string"
},
"aspect": {
"type": "string"
}
}
}
},
"function": {
"type": "string"
},
"keywords": {
"type": "array",
"items": {
"type": "string"
}
},
"lengthAa": {
"type": "integer"
},
"organism": {
"type": "object",
"properties": {
"taxid": {
"type": "integer"
},
"commonName": {
"type": "string"
},
"scientificName": {
"type": "string"
}
}
},
"reviewed": {
"type": "boolean"
},
"accession": {
"type": "string"
},
"proteinName": {
"type": "string"
},
"pdbStructures": {
"type": "array",
"items": {
"type": "string"
}
},
"molecularWeightDa": {
"type": "integer"
},
"subcellularLocations": {
"type": "array",
"items": {
"type": "string"
}
}
}
}
}
}
},
"total": {
"type": "integer"
},
"source": {
"type": "object",
"properties": {
"url": {
"type": "string"
},
"license": {
"type": "string"
},
"provider": {
"type": "string"
}
}
}
}
}
}
}
}
},
"x402Version": 2
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.0036USDC≈ $0.0036 USD
on Base · exact scheme
Pay 0.0036 USDC on Base to 0x2b6D…C32C5. The signed payment is good for 1 minute.
- Paid to
- 0x2b6D…C32C5
- USD Coin contract
- 0x8335…02913
- Payment window
- 1 minute
- As published
- 3600 smallest units
3600units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- TW6nta…cyWhn
- Token contract
- EPjFWd…TDt1v
- Payment window
- 1 minute
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x2b6D4988Db4723E6908Db86Ab2b8dFBc51FC32C5",
"amount": "3600",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 60
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"name": "USDC",
"version": "1",
"feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
},
"payTo": "TW6ntaGzvj63ZgPjszd4FCGmVTGfzv1MAYZbjYcyWhn",
"amount": "3600",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 60
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"accession": "P04637"
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method",
"queryParams"
],
"properties": {
"type": {
"const": "http"
},
"method": {
"const": "GET"
},
"queryParams": {
"required": [
"accession"
],
"properties": {
"accession": {
"type": "string",
"description": "UniProtKB accession, e.g. \"P04637\"."
}
}
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-19 16:00Z
- Last indexed by Roundhouse
- 2026-09-24 17:50Z
- Last enriched (probe, favicon, geo)
- 2026-09-21 02:45Z
- x402 version
- 2
- Max timeout
- 60s
- Liveness probe
- HTTP 402
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. 5 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 2s 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=2s' 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://2s.io/api/bio/protein, 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.