Parameters4
| Parameter | Type | Default | Example |
|---|---|---|---|
max_tokens | number | null | 128 |
messages | array | null | [] |
model | string | null | gpt-5.5 |
stream | boolean | null | false |
Service overview
Fetch x402 discovery documents, rank matching resources by advertised price, live-check the cheapest candidates with 402 quote inspection, and return a buyer-ready shortlist with verified amount, scheme, network, payTo, tags, and warnings. This deterministic endpoint does not call an upstream model. GET variant for agents, crawlers, and wallets that prefer query parameters over a JSON body. Pay up to $0.005 per request with x402 USDC on Base.
Level up your agent by giving it access to thousands of services. All payable per-request via x402. No API keys, no accounts.
Paste into your agentic chat and let your agent guide you.
npx awal x402 pay "https://gpt55.558686.xyz/v1/chat/completions" \
--method POST \
--data '{
"max_tokens": "{max_tokens}",
"messages": "{messages}",
"model": "{model}",
"stream": "{stream}"
}'{
"endpoint": "POST /v1/chat/completions",
"paid": true,
"query": "example input",
"result": {
"value": "Structured response from the service."
}
}API surface
43 crawlable routes
| Parameter | Type | Default | Example |
|---|---|---|---|
max_tokens | number | null | 128 |
messages | array | null | [] |
model | string | null | gpt-5.5 |
stream | boolean | null | false |
| Parameter | Type | Default | Example |
|---|---|---|---|
context | string | null | x402 is a payment protocol for HTTP APIs. |
question | string | null | What is x402? |
| Parameter | Type | Default | Example |
|---|---|---|---|
mode | string | null | encode |
text | string | null | hello |
urlsafe | boolean | null | false |
| Parameter | Type | Default | Example |
|---|---|---|---|
case | string | null | title |
text | string | null | hello x402 world |
| Parameter | Type | Default | Example |
|---|---|---|---|
code | string | null | function add(a,b){ return a-b } |
focus | string | null | bugs and tests |
language | string | null | javascript |
| Parameter | Type | Default | Example |
|---|---|---|---|
hex | string | null | #22c55e |
| Parameter | Type | Default | Example |
|---|---|---|---|
after | string | null | beta
gamma |
before | string | null | alpha
beta |
| Parameter | Type | Default | Example |
|---|---|---|---|
url | string | null | https://api.example.com/path |
| Parameter | Type | Default | Example |
|---|---|---|---|
email | string | null | [email protected] |
| Parameter | Type | Default | Example |
|---|---|---|---|
fields | array | null | [] |
text | string | null | Alice from Acme wants a demo next Tuesday. Email [email protected]. |
| Parameter | Type | Default | Example |
|---|---|---|---|
algorithm | string | null | sha256 |
encoding | string | null | hex |
text | string | null | hello |
| Parameter | Type | Default | Example |
|---|---|---|---|
mode | string | null | escape |
text | string | null | <hello & x402> |
| Parameter | Type | Default | Example |
|---|---|---|---|
html | string | null | <h1>Hello</h1><p>x402</p> |
max_chars | number | null | 2000 |
| Parameter | Type | Default | Example |
|---|---|---|---|
url | string | null | https://example.com |
| Parameter | Type | Default | Example |
|---|---|---|---|
json | string | null | { "ok": true, "items": [1, 2] } |
| Parameter | Type | Default | Example |
|---|---|---|---|
json | string | null | {"ok":true,"items":[1,2]} |
pretty | boolean | null | true |
| Parameter | Type | Default | Example |
|---|---|---|---|
token | string | null | eyJhbGciOiJub25lIn0.eyJzdWIiOiJleGFtcGxlIn0. |
| Parameter | Type | Default | Example |
|---|---|---|---|
query | string | null | a=1&a=2&b=test |
| Parameter | Type | Default | Example |
|---|---|---|---|
flags | string | null | g |
limit | number | null | 10 |
pattern | string | null | [\w.-]+@[\w.-]+ |
text | string | null | [email protected] and [email protected] |
| Parameter | Type | Default | Example |
|---|---|---|---|
separator | string | null | - |
text | string | null | Hello, x402 World! |
| Parameter | Type | Default | Example |
|---|---|---|---|
descending | boolean | null | false |
numeric | boolean | null | false |
text | string | null | beta
alpha
10
2 |
| Parameter | Type | Default | Example |
|---|---|---|---|
format | string | null | bullets |
text | string | null | Paste text to summarize here. |
| Parameter | Type | Default | Example |
|---|---|---|---|
text | string | null | Hello world.
This is a short text. |
| Parameter | Type | Default | Example |
|---|---|---|---|
value | string | null | 2026-06-10T00:00:00Z |
| Parameter | Type | Default | Example |
|---|---|---|---|
target_language | string | null | Chinese |
text | string | null | Hello, world. |
| Parameter | Type | Default | Example |
|---|---|---|---|
case_sensitive | boolean | null | true |
text | string | null | alpha
beta
alpha |
| Parameter | Type | Default | Example |
|---|---|---|---|
component | boolean | null | true |
mode | string | null | encode |
text | string | null | hello world |
| Parameter | Type | Default | Example |
|---|---|---|---|
limit | number | null | 50 |
url | string | null | https://example.com |
| Parameter | Type | Default | Example |
|---|---|---|---|
url | string | null | https://example.com |
| Parameter | Type | Default | Example |
|---|---|---|---|
url | string | null | https://example.com/path?a=1&a=2#top |
| Parameter | Type | Default | Example |
|---|---|---|---|
max_chars | number | null | 2000 |
url | string | null | https://example.com |
| Parameter | Type | Default | Example |
|---|---|---|---|
count | number | null | 1 |
| Parameter | Type | Default | Example |
|---|---|---|---|
method | string | null | GET |
urls | array | null | [] |
| Parameter | Type | Default | Example |
|---|---|---|---|
limit | number | null | 10 |
pay_to | string | null | 0x1f0130669ca6fd02e025a984cc038f139df19a2f |
query | string | null | gpt-5.5 |
| Parameter | Type | Default | Example |
|---|---|---|---|
limit | number | null | 5 |
query | string | null | quote |
urls | array | null | [] |
verify_limit | number | null | 5 |
| Parameter | Type | Default | Example |
|---|---|---|---|
page_size | number | null | 50 |
pages | number | null | 2 |
pay_to | string | null | 0x1f0130669ca6fd02e025a984cc038f139df19a2f |
query | string | null | gpt-5.5 x402 |
sources | array | null | [] |
url | string | null | https://gpt55.558686.xyz |
| Parameter | Type | Default | Example |
|---|---|---|---|
limit | number | null | 20 |
query | string | null | quote |
urls | array | null | [] |
| Parameter | Type | Default | Example |
|---|---|---|---|
include_market | boolean | null | true |
query | string | null | gpt-5.5 x402 |
url | string | null | https://gpt55.558686.xyz |
| Parameter | Type | Default | Example |
|---|---|---|---|
limit | number | null | 50 |
page_size | number | null | 50 |
pages | number | null | 1 |
query | string | null | ai |
sources | array | null | [] |
| Parameter | Type | Default | Example |
|---|---|---|---|
base_url | string | null | https://gpt55.558686.xyz |
max_usdc_per_call | number | null | 0.01 |
service_name | string | null | GPT-5.5 x402 Gateway |
| Parameter | Type | Default | Example |
|---|---|---|---|
focus | string | null | ai-tools |
limit | number | null | 80 |
sources | array | null | [] |
| Parameter | Type | Default | Example |
|---|---|---|---|
url | string | null | https://example.com |
FAQ
Service
Base wallet portfolio breakdown: up to 100 token positions with live USD price and value, portfolio percentage, 24h price change — native ETH included, spam filtered, top 50 returned; truncated:true means the wallet exceeds the 100-position fetched page (totals null then). Plus total value, top-position concentration and an AI bagcheck read. Wallet holdings, wallet portfolio, wallet balance, bagcheck. $0.02 per call.
Service
Detect upgradeable proxy patterns (EIP-1967, UUPS, Transparent) via eth_getStorageAt - returns the implementation address behind a proxy
Service
Exa /contents endpoint