Initiate an intent with Permit2
curl --request POST \
--url https://api.eco.com/v1/intents/submit/permit2 \
--header 'Content-Type: application/json' \
--header 'x-api-key: <api-key>' \
--data '
{
"chainId": 8453,
"target": {
"quoteId": "quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23"
},
"permit2": {
"details": {
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "1000000",
"expiration": 1789526504,
"nonce": 0
},
"spender": "0xf6358b8f1d0Ec04EBc9Fe8FdEe5e6791640D1c2F",
"sigDeadline": "1789526504"
},
"signature": "0xedc90fdd27654dd49ac1087901450c9c5fdf444943f61faa8d787bee86304d821f06a5db4a67eddf5cf286014d6ec8bd33c64f9e072045a9f3c5e50cc28960fc1b"
}
'import requests
url = "https://api.eco.com/v1/intents/submit/permit2"
payload = {
"chainId": 8453,
"target": { "quoteId": "quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23" },
"permit2": {
"details": {
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "1000000",
"expiration": 1789526504,
"nonce": 0
},
"spender": "0xf6358b8f1d0Ec04EBc9Fe8FdEe5e6791640D1c2F",
"sigDeadline": "1789526504"
},
"signature": "0xedc90fdd27654dd49ac1087901450c9c5fdf444943f61faa8d787bee86304d821f06a5db4a67eddf5cf286014d6ec8bd33c64f9e072045a9f3c5e50cc28960fc1b"
}
headers = {
"x-api-key": "<api-key>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
body: JSON.stringify({
chainId: 8453,
target: {quoteId: 'quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23'},
permit2: {
details: {
token: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913',
amount: '1000000',
expiration: 1789526504,
nonce: 0
},
spender: '0xf6358b8f1d0Ec04EBc9Fe8FdEe5e6791640D1c2F',
sigDeadline: '1789526504'
},
signature: '0xedc90fdd27654dd49ac1087901450c9c5fdf444943f61faa8d787bee86304d821f06a5db4a67eddf5cf286014d6ec8bd33c64f9e072045a9f3c5e50cc28960fc1b'
})
};
fetch('https://api.eco.com/v1/intents/submit/permit2', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.eco.com/v1/intents/submit/permit2",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'chainId' => 8453,
'target' => [
'quoteId' => 'quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23'
],
'permit2' => [
'details' => [
'token' => '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913',
'amount' => '1000000',
'expiration' => 1789526504,
'nonce' => 0
],
'spender' => '0xf6358b8f1d0Ec04EBc9Fe8FdEe5e6791640D1c2F',
'sigDeadline' => '1789526504'
],
'signature' => '0xedc90fdd27654dd49ac1087901450c9c5fdf444943f61faa8d787bee86304d821f06a5db4a67eddf5cf286014d6ec8bd33c64f9e072045a9f3c5e50cc28960fc1b'
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"x-api-key: <api-key>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://api.eco.com/v1/intents/submit/permit2"
payload := strings.NewReader("{\n \"chainId\": 8453,\n \"target\": {\n \"quoteId\": \"quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23\"\n },\n \"permit2\": {\n \"details\": {\n \"token\": \"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\n \"amount\": \"1000000\",\n \"expiration\": 1789526504,\n \"nonce\": 0\n },\n \"spender\": \"0xf6358b8f1d0Ec04EBc9Fe8FdEe5e6791640D1c2F\",\n \"sigDeadline\": \"1789526504\"\n },\n \"signature\": \"0xedc90fdd27654dd49ac1087901450c9c5fdf444943f61faa8d787bee86304d821f06a5db4a67eddf5cf286014d6ec8bd33c64f9e072045a9f3c5e50cc28960fc1b\"\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("x-api-key", "<api-key>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://api.eco.com/v1/intents/submit/permit2")
.header("x-api-key", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"chainId\": 8453,\n \"target\": {\n \"quoteId\": \"quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23\"\n },\n \"permit2\": {\n \"details\": {\n \"token\": \"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\n \"amount\": \"1000000\",\n \"expiration\": 1789526504,\n \"nonce\": 0\n },\n \"spender\": \"0xf6358b8f1d0Ec04EBc9Fe8FdEe5e6791640D1c2F\",\n \"sigDeadline\": \"1789526504\"\n },\n \"signature\": \"0xedc90fdd27654dd49ac1087901450c9c5fdf444943f61faa8d787bee86304d821f06a5db4a67eddf5cf286014d6ec8bd33c64f9e072045a9f3c5e50cc28960fc1b\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.eco.com/v1/intents/submit/permit2")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"chainId\": 8453,\n \"target\": {\n \"quoteId\": \"quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23\"\n },\n \"permit2\": {\n \"details\": {\n \"token\": \"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\n \"amount\": \"1000000\",\n \"expiration\": 1789526504,\n \"nonce\": 0\n },\n \"spender\": \"0xf6358b8f1d0Ec04EBc9Fe8FdEe5e6791640D1c2F\",\n \"sigDeadline\": \"1789526504\"\n },\n \"signature\": \"0xedc90fdd27654dd49ac1087901450c9c5fdf444943f61faa8d787bee86304d821f06a5db4a67eddf5cf286014d6ec8bd33c64f9e072045a9f3c5e50cc28960fc1b\"\n}"
response = http.request(request)
puts response.read_body{
"id": "gasless:0f450218-1b2c-4d3e-8f9a-0b1c2d3e4f5a",
"status": "published",
"signatureHash": "0x94245dddfb2339e6e06fe251c90de895bf2995ff3c5a5fb185390f1850ed6726",
"subStatuses": [
{
"chainId": 8453,
"quoteIds": [
"quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23"
],
"txHash": "0x3ef97346fd076aadb54c851f33ba9234feb34d27442b9bb0abc7a0d75827af13",
"intentHashes": [
"0x3f1886e7c3a4cab62b4a0661e393600f0917d5a514652e96623b0f17ce0d3749"
],
"state": "published"
}
],
"createdAt": 1789522604,
"updatedAt": 1789522654
}{
"id": "gasless:0f450218-1b2c-4d3e-8f9a-0b1c2d3e4f5a",
"status": "processing",
"signatureHash": "0x94245dddfb2339e6e06fe251c90de895bf2995ff3c5a5fb185390f1850ed6726",
"subStatuses": [
{
"chainId": 8453,
"quoteIds": [
"quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23"
],
"txHash": null,
"intentHashes": [],
"state": "pending"
}
],
"createdAt": 1789522604,
"updatedAt": 1789522614
}{
"type": "https://api.eco.com/v1/errors/invalid-request",
"title": "Request failed validation",
"status": 400,
"code": "invalid-request",
"detail": "chainId: Invalid input: expected number, received undefined; permit2.sigDeadline: Invalid input: expected string, received number",
"errors": [
{
"field": "chainId",
"detail": "Invalid input: expected number, received undefined"
},
{
"field": "permit2.sigDeadline",
"detail": "Invalid input: expected string, received number"
}
],
"requestId": "f371e43e6fd4406b10e19487b3170edf"
}{
"type": "https://api.eco.com/v1/errors/invalid-api-key",
"title": "API key is missing, unknown, or revoked",
"status": 401,
"code": "invalid-api-key",
"requestId": "98e4c42f-9c70-4539-843e-8d31803001e6"
}{
"Message": "User is not authorized to access this resource with an explicit deny in an identity-based policy"
}{
"type": "https://api.eco.com/v1/errors/signature-already-bound",
"title": "This signature is already pinned to a different target",
"status": 409,
"code": "signature-already-bound",
"requestId": "3ff33e83251b3cdb7d3daf15d186b89b"
}{
"type": "https://api.eco.com/v1/errors/quote-expired",
"title": "The quote is unknown or expired at submit time",
"status": 410,
"code": "quote-expired",
"requestId": "19ff8aa0914e6fbe2fcb7fbe930bf0ea"
}{
"type": "https://api.eco.com/v1/errors/chain-not-supported",
"title": "Chain is not supported",
"status": 422,
"code": "chain-not-supported",
"requestId": "252dbcdeebe5465fdc089843e8643b37"
}{
"type": "https://api.eco.com/v1/errors/rate-limit-exceeded",
"title": "Rate limit exceeded",
"status": 429,
"code": "rate-limit-exceeded",
"requestId": "1eac3d6cc2aafa524b0c47a039576f8c"
}{
"type": "https://api.eco.com/v1/errors/internal-error",
"title": "Internal error",
"status": 500,
"code": "internal-error",
"requestId": "02dabcf0f4e3def9a6091526d3d21022"
}{
"type": "<string>",
"title": "<string>",
"status": 499,
"code": "<string>",
"detail": "<string>",
"instance": "<string>",
"legacyCode": "<string>",
"solverErrors": [
{
"solver": "<string>",
"message": "<string>",
"solverName": "<string>",
"code": "<string>"
}
],
"errors": [
{
"field": "<string>",
"detail": "<string>"
}
],
"requestId": "<string>"
}Quote funding and status
Initiate an intent with Permit2
Funds a quote gaslessly with a signed Permit2 PermitSingle. Requires an API key.
POST
/
v1
/
intents
/
submit
/
permit2
Initiate an intent with Permit2
curl --request POST \
--url https://api.eco.com/v1/intents/submit/permit2 \
--header 'Content-Type: application/json' \
--header 'x-api-key: <api-key>' \
--data '
{
"chainId": 8453,
"target": {
"quoteId": "quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23"
},
"permit2": {
"details": {
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "1000000",
"expiration": 1789526504,
"nonce": 0
},
"spender": "0xf6358b8f1d0Ec04EBc9Fe8FdEe5e6791640D1c2F",
"sigDeadline": "1789526504"
},
"signature": "0xedc90fdd27654dd49ac1087901450c9c5fdf444943f61faa8d787bee86304d821f06a5db4a67eddf5cf286014d6ec8bd33c64f9e072045a9f3c5e50cc28960fc1b"
}
'import requests
url = "https://api.eco.com/v1/intents/submit/permit2"
payload = {
"chainId": 8453,
"target": { "quoteId": "quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23" },
"permit2": {
"details": {
"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"amount": "1000000",
"expiration": 1789526504,
"nonce": 0
},
"spender": "0xf6358b8f1d0Ec04EBc9Fe8FdEe5e6791640D1c2F",
"sigDeadline": "1789526504"
},
"signature": "0xedc90fdd27654dd49ac1087901450c9c5fdf444943f61faa8d787bee86304d821f06a5db4a67eddf5cf286014d6ec8bd33c64f9e072045a9f3c5e50cc28960fc1b"
}
headers = {
"x-api-key": "<api-key>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {'x-api-key': '<api-key>', 'Content-Type': 'application/json'},
body: JSON.stringify({
chainId: 8453,
target: {quoteId: 'quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23'},
permit2: {
details: {
token: '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913',
amount: '1000000',
expiration: 1789526504,
nonce: 0
},
spender: '0xf6358b8f1d0Ec04EBc9Fe8FdEe5e6791640D1c2F',
sigDeadline: '1789526504'
},
signature: '0xedc90fdd27654dd49ac1087901450c9c5fdf444943f61faa8d787bee86304d821f06a5db4a67eddf5cf286014d6ec8bd33c64f9e072045a9f3c5e50cc28960fc1b'
})
};
fetch('https://api.eco.com/v1/intents/submit/permit2', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://api.eco.com/v1/intents/submit/permit2",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'chainId' => 8453,
'target' => [
'quoteId' => 'quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23'
],
'permit2' => [
'details' => [
'token' => '0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913',
'amount' => '1000000',
'expiration' => 1789526504,
'nonce' => 0
],
'spender' => '0xf6358b8f1d0Ec04EBc9Fe8FdEe5e6791640D1c2F',
'sigDeadline' => '1789526504'
],
'signature' => '0xedc90fdd27654dd49ac1087901450c9c5fdf444943f61faa8d787bee86304d821f06a5db4a67eddf5cf286014d6ec8bd33c64f9e072045a9f3c5e50cc28960fc1b'
]),
CURLOPT_HTTPHEADER => [
"Content-Type: application/json",
"x-api-key: <api-key>"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://api.eco.com/v1/intents/submit/permit2"
payload := strings.NewReader("{\n \"chainId\": 8453,\n \"target\": {\n \"quoteId\": \"quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23\"\n },\n \"permit2\": {\n \"details\": {\n \"token\": \"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\n \"amount\": \"1000000\",\n \"expiration\": 1789526504,\n \"nonce\": 0\n },\n \"spender\": \"0xf6358b8f1d0Ec04EBc9Fe8FdEe5e6791640D1c2F\",\n \"sigDeadline\": \"1789526504\"\n },\n \"signature\": \"0xedc90fdd27654dd49ac1087901450c9c5fdf444943f61faa8d787bee86304d821f06a5db4a67eddf5cf286014d6ec8bd33c64f9e072045a9f3c5e50cc28960fc1b\"\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("x-api-key", "<api-key>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://api.eco.com/v1/intents/submit/permit2")
.header("x-api-key", "<api-key>")
.header("Content-Type", "application/json")
.body("{\n \"chainId\": 8453,\n \"target\": {\n \"quoteId\": \"quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23\"\n },\n \"permit2\": {\n \"details\": {\n \"token\": \"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\n \"amount\": \"1000000\",\n \"expiration\": 1789526504,\n \"nonce\": 0\n },\n \"spender\": \"0xf6358b8f1d0Ec04EBc9Fe8FdEe5e6791640D1c2F\",\n \"sigDeadline\": \"1789526504\"\n },\n \"signature\": \"0xedc90fdd27654dd49ac1087901450c9c5fdf444943f61faa8d787bee86304d821f06a5db4a67eddf5cf286014d6ec8bd33c64f9e072045a9f3c5e50cc28960fc1b\"\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.eco.com/v1/intents/submit/permit2")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["x-api-key"] = '<api-key>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"chainId\": 8453,\n \"target\": {\n \"quoteId\": \"quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23\"\n },\n \"permit2\": {\n \"details\": {\n \"token\": \"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\n \"amount\": \"1000000\",\n \"expiration\": 1789526504,\n \"nonce\": 0\n },\n \"spender\": \"0xf6358b8f1d0Ec04EBc9Fe8FdEe5e6791640D1c2F\",\n \"sigDeadline\": \"1789526504\"\n },\n \"signature\": \"0xedc90fdd27654dd49ac1087901450c9c5fdf444943f61faa8d787bee86304d821f06a5db4a67eddf5cf286014d6ec8bd33c64f9e072045a9f3c5e50cc28960fc1b\"\n}"
response = http.request(request)
puts response.read_body{
"id": "gasless:0f450218-1b2c-4d3e-8f9a-0b1c2d3e4f5a",
"status": "published",
"signatureHash": "0x94245dddfb2339e6e06fe251c90de895bf2995ff3c5a5fb185390f1850ed6726",
"subStatuses": [
{
"chainId": 8453,
"quoteIds": [
"quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23"
],
"txHash": "0x3ef97346fd076aadb54c851f33ba9234feb34d27442b9bb0abc7a0d75827af13",
"intentHashes": [
"0x3f1886e7c3a4cab62b4a0661e393600f0917d5a514652e96623b0f17ce0d3749"
],
"state": "published"
}
],
"createdAt": 1789522604,
"updatedAt": 1789522654
}{
"id": "gasless:0f450218-1b2c-4d3e-8f9a-0b1c2d3e4f5a",
"status": "processing",
"signatureHash": "0x94245dddfb2339e6e06fe251c90de895bf2995ff3c5a5fb185390f1850ed6726",
"subStatuses": [
{
"chainId": 8453,
"quoteIds": [
"quote:8a7cbdcd-2aed-40b0-ab08-c4c10af15f23"
],
"txHash": null,
"intentHashes": [],
"state": "pending"
}
],
"createdAt": 1789522604,
"updatedAt": 1789522614
}{
"type": "https://api.eco.com/v1/errors/invalid-request",
"title": "Request failed validation",
"status": 400,
"code": "invalid-request",
"detail": "chainId: Invalid input: expected number, received undefined; permit2.sigDeadline: Invalid input: expected string, received number",
"errors": [
{
"field": "chainId",
"detail": "Invalid input: expected number, received undefined"
},
{
"field": "permit2.sigDeadline",
"detail": "Invalid input: expected string, received number"
}
],
"requestId": "f371e43e6fd4406b10e19487b3170edf"
}{
"type": "https://api.eco.com/v1/errors/invalid-api-key",
"title": "API key is missing, unknown, or revoked",
"status": 401,
"code": "invalid-api-key",
"requestId": "98e4c42f-9c70-4539-843e-8d31803001e6"
}{
"Message": "User is not authorized to access this resource with an explicit deny in an identity-based policy"
}{
"type": "https://api.eco.com/v1/errors/signature-already-bound",
"title": "This signature is already pinned to a different target",
"status": 409,
"code": "signature-already-bound",
"requestId": "3ff33e83251b3cdb7d3daf15d186b89b"
}{
"type": "https://api.eco.com/v1/errors/quote-expired",
"title": "The quote is unknown or expired at submit time",
"status": 410,
"code": "quote-expired",
"requestId": "19ff8aa0914e6fbe2fcb7fbe930bf0ea"
}{
"type": "https://api.eco.com/v1/errors/chain-not-supported",
"title": "Chain is not supported",
"status": 422,
"code": "chain-not-supported",
"requestId": "252dbcdeebe5465fdc089843e8643b37"
}{
"type": "https://api.eco.com/v1/errors/rate-limit-exceeded",
"title": "Rate limit exceeded",
"status": 429,
"code": "rate-limit-exceeded",
"requestId": "1eac3d6cc2aafa524b0c47a039576f8c"
}{
"type": "https://api.eco.com/v1/errors/internal-error",
"title": "Internal error",
"status": 500,
"code": "internal-error",
"requestId": "02dabcf0f4e3def9a6091526d3d21022"
}{
"type": "<string>",
"title": "<string>",
"status": 499,
"code": "<string>",
"detail": "<string>",
"instance": "<string>",
"legacyCode": "<string>",
"solverErrors": [
{
"solver": "<string>",
"message": "<string>",
"solverName": "<string>",
"code": "<string>"
}
],
"errors": [
{
"field": "<string>",
"detail": "<string>"
}
],
"requestId": "<string>"
}Funds a quote gaslessly with a signed Permit2
PermitSingle (AllowanceTransfer, not SignatureTransfer). chainId is the chain the permit was signed for, target.quoteId names the quote, permit2.spender is the quote’s execution.vault, and signature is the top-level EIP-712 signature. permit2.sigDeadline is a decimal string. The first submission answers 202 with a gasless job; resending the same signature returns the existing job with 200.
Requires x-api-key. Partner pricing, attribution, and enabled features are tied to the key. Without a key the gateway answers 403 with a plain JSON body ({"Message": "User is not authorized ..."}); a key that is unknown, revoked, or not enabled for v1 answers 401 invalid-api-key. No requests-per-second quota is published. Handle 429 and honor Retry-After when present.
Examples use real mainnet token and contract addresses with placeholder wallets, hashes, signatures, and IDs.Authorizations
Body
application/json
Response
Existing job for the same signature and target.