13 paid x402 tools, USDC/Base. Free check: GET /preview<path>=200 sample. Copy-paste pay: /llms.txt
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{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {}
}Coinbase spot/buy/sell price with spread percent Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/crypto-price = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.002 USDC on Base, x402)
| Argument | Type | Description |
|---|---|---|
| to* | string | Quote asset code, e.g. USD |
| from* | string | Base asset code, e.g. BTC |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"from",
"to"
],
"properties": {
"to": {
"type": "string",
"description": "Quote asset code, e.g. USD"
},
"from": {
"type": "string",
"description": "Base asset code, e.g. BTC"
}
},
"additionalProperties": false
}SPF/DKIM/DMARC deliverability audit for a sending domain Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/deliverability = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.003 USDC on Base, x402)
| Argument | Type | Description |
|---|---|---|
| domain* | string | Domain to audit, e.g. openai.com |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"domain"
],
"properties": {
"domain": {
"type": "string",
"description": "Domain to audit, e.g. openai.com"
}
},
"additionalProperties": false
}Domain registration date, age in days and registrar via RDAP Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/domain-age = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.003 USDC on Base, x402)
| Argument | Type | Description |
|---|---|---|
| domain* | string | Domain to look up |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"domain"
],
"properties": {
"domain": {
"type": "string",
"description": "Domain to look up"
}
},
"additionalProperties": false
}12-point cold email score with concrete fixes Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/grade = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.005 USDC on Base, x402)
| Argument | Type | Description |
|---|---|---|
| body* | string | Plain-text email body |
| subject* | string | Email subject line |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"subject",
"body"
],
"properties": {
"body": {
"type": "string",
"description": "Plain-text email body"
},
"subject": {
"type": "string",
"description": "Email subject line"
}
},
"additionalProperties": false
}Personalized cold email from proven templates Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/template = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.01 USDC on Base, x402)
| Argument | Type | Description |
|---|---|---|
| name | string | Recipient name |
| offer | string | What you are offering |
| company | string | Recipient company |
| persona | string | founder | agency | freelancer |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {
"name": {
"type": "string",
"description": "Recipient name"
},
"offer": {
"type": "string",
"description": "What you are offering"
},
"company": {
"type": "string",
"description": "Recipient company"
},
"persona": {
"type": "string",
"description": "founder | agency | freelancer"
}
},
"additionalProperties": false
}SHA-256/384/512, hex, base64, base64url and CRC32 of a UTF-8 string Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/hash = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)
| Argument | Type | Description |
|---|---|---|
| text* | string | UTF-8 text to hash |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"text"
],
"properties": {
"text": {
"type": "string",
"description": "UTF-8 text to hash"
}
},
"additionalProperties": false
}Flatten JSON to dot paths or convert rows to CSV Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/json = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)
| Argument | Type | Description |
|---|---|---|
| data* | string | JSON string |
| mode | string | flatten | csv (default flatten) |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"data"
],
"properties": {
"data": {
"type": "string",
"description": "JSON string"
},
"mode": {
"type": "string",
"description": "flatten | csv (default flatten)"
}
},
"additionalProperties": false
}Decode a JWT header+payload with safety flags (never verifies the signature) Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/jwt-decode = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)
| Argument | Type | Description |
|---|---|---|
| token* | string | JWT to decode |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"token"
],
"properties": {
"token": {
"type": "string",
"description": "JWT to decode"
}
},
"additionalProperties": false
}Regex matches with groups, count and a backtracking-risk heuristic Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/regex = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)
| Argument | Type | Description |
|---|---|---|
| text* | string | Text to search |
| flags | string | Regex flags (subset of dgimsuy) |
| pattern* | string | Regular expression |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"pattern",
"text"
],
"properties": {
"text": {
"type": "string",
"description": "Text to search"
},
"flags": {
"type": "string",
"description": "Regex flags (subset of dgimsuy)"
},
"pattern": {
"type": "string",
"description": "Regular expression"
}
},
"additionalProperties": false
}Unicode-aware url-safe slug (latin + Cyrillic transliteration) Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/slug = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)
| Argument | Type | Description |
|---|---|---|
| text* | string | Text to slugify |
| maxlength | integer | Max slug length 1-500 (default 60) |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"text"
],
"properties": {
"text": {
"type": "string",
"description": "Text to slugify"
},
"maxlength": {
"type": "integer",
"description": "Max slug length 1-500 (default 60)"
}
},
"additionalProperties": false
}Batch random IDs: UUIDv4, UUIDv7, ULID or nanoid Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/uuid = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)
| Argument | Type | Description |
|---|---|---|
| count | integer | How many IDs, 1-100 (default 1) |
| version | string | v4 | v7 | ulid | nanoid (default v4) |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {
"count": {
"type": "integer",
"maximum": 100,
"minimum": 1,
"description": "How many IDs, 1-100 (default 1)"
},
"version": {
"type": "string",
"description": "v4 | v7 | ulid | nanoid (default v4)"
}
},
"additionalProperties": false
}Current weather + next 3h temperatures (open-meteo) Free check: https://sigtap-outreach-api.sigtap.workers.dev/preview/tools/weather = 200 demo sample, no wallet. Paid call: 402 challenge -> sign -> retry = settled on-chain. ($0.001 USDC on Base, x402)
| Argument | Type | Description |
|---|---|---|
| lat* | number | Latitude -90..90 |
| lon* | number | Longitude -180..180 |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"lat",
"lon"
],
"properties": {
"lat": {
"type": "number",
"description": "Latitude -90..90"
},
"lon": {
"type": "number",
"description": "Longitude -180..180"
}
},
"additionalProperties": false
}