Adopt a reviewed A2A source revision
curl --request POST \
--url https://api.checkfu.com/v1/tool-sources/{id}/source-revisions \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--header 'checkfu-version: <checkfu-version>' \
--header 'idempotency-key: <idempotency-key>' \
--data '
{
"expected_version": 1,
"source": {
"kind": "a2a",
"card_url": "<string>",
"verification_keys": [
{
"kty": "EC",
"crv": "P-256",
"x": "<string>",
"y": "<string>",
"kid": "<string>",
"alg": "ES256"
}
]
},
"provider_package": {
"name": "<string>",
"version": 1,
"digest": "<string>"
},
"connections": [
{
"connection_id": "<string>",
"expected_version": 1
}
]
}
'import requests
url = "https://api.checkfu.com/v1/tool-sources/{id}/source-revisions"
payload = {
"expected_version": 1,
"source": {
"kind": "a2a",
"card_url": "<string>",
"verification_keys": [
{
"kty": "EC",
"crv": "P-256",
"x": "<string>",
"y": "<string>",
"kid": "<string>",
"alg": "ES256"
}
]
},
"provider_package": {
"name": "<string>",
"version": 1,
"digest": "<string>"
},
"connections": [
{
"connection_id": "<string>",
"expected_version": 1
}
]
}
headers = {
"checkfu-version": "<checkfu-version>",
"idempotency-key": "<idempotency-key>",
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {
'checkfu-version': '<checkfu-version>',
'idempotency-key': '<idempotency-key>',
Authorization: 'Bearer <token>',
'Content-Type': 'application/json'
},
body: JSON.stringify({
expected_version: 1,
source: {
kind: 'a2a',
card_url: '<string>',
verification_keys: [
{
kty: 'EC',
crv: 'P-256',
x: '<string>',
y: '<string>',
kid: '<string>',
alg: 'ES256'
}
]
},
provider_package: {name: '<string>', version: 1, digest: '<string>'},
connections: [{connection_id: '<string>', expected_version: 1}]
})
};
fetch('https://api.checkfu.com/v1/tool-sources/{id}/source-revisions', 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.checkfu.com/v1/tool-sources/{id}/source-revisions",
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([
'expected_version' => 1,
'source' => [
'kind' => 'a2a',
'card_url' => '<string>',
'verification_keys' => [
[
'kty' => 'EC',
'crv' => 'P-256',
'x' => '<string>',
'y' => '<string>',
'kid' => '<string>',
'alg' => 'ES256'
]
]
],
'provider_package' => [
'name' => '<string>',
'version' => 1,
'digest' => '<string>'
],
'connections' => [
[
'connection_id' => '<string>',
'expected_version' => 1
]
]
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json",
"checkfu-version: <checkfu-version>",
"idempotency-key: <idempotency-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.checkfu.com/v1/tool-sources/{id}/source-revisions"
payload := strings.NewReader("{\n \"expected_version\": 1,\n \"source\": {\n \"kind\": \"a2a\",\n \"card_url\": \"<string>\",\n \"verification_keys\": [\n {\n \"kty\": \"EC\",\n \"crv\": \"P-256\",\n \"x\": \"<string>\",\n \"y\": \"<string>\",\n \"kid\": \"<string>\",\n \"alg\": \"ES256\"\n }\n ]\n },\n \"provider_package\": {\n \"name\": \"<string>\",\n \"version\": 1,\n \"digest\": \"<string>\"\n },\n \"connections\": [\n {\n \"connection_id\": \"<string>\",\n \"expected_version\": 1\n }\n ]\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("checkfu-version", "<checkfu-version>")
req.Header.Add("idempotency-key", "<idempotency-key>")
req.Header.Add("Authorization", "Bearer <token>")
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.checkfu.com/v1/tool-sources/{id}/source-revisions")
.header("checkfu-version", "<checkfu-version>")
.header("idempotency-key", "<idempotency-key>")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"expected_version\": 1,\n \"source\": {\n \"kind\": \"a2a\",\n \"card_url\": \"<string>\",\n \"verification_keys\": [\n {\n \"kty\": \"EC\",\n \"crv\": \"P-256\",\n \"x\": \"<string>\",\n \"y\": \"<string>\",\n \"kid\": \"<string>\",\n \"alg\": \"ES256\"\n }\n ]\n },\n \"provider_package\": {\n \"name\": \"<string>\",\n \"version\": 1,\n \"digest\": \"<string>\"\n },\n \"connections\": [\n {\n \"connection_id\": \"<string>\",\n \"expected_version\": 1\n }\n ]\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.checkfu.com/v1/tool-sources/{id}/source-revisions")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["checkfu-version"] = '<checkfu-version>'
request["idempotency-key"] = '<idempotency-key>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"expected_version\": 1,\n \"source\": {\n \"kind\": \"a2a\",\n \"card_url\": \"<string>\",\n \"verification_keys\": [\n {\n \"kty\": \"EC\",\n \"crv\": \"P-256\",\n \"x\": \"<string>\",\n \"y\": \"<string>\",\n \"kid\": \"<string>\",\n \"alg\": \"ES256\"\n }\n ]\n },\n \"provider_package\": {\n \"name\": \"<string>\",\n \"version\": 1,\n \"digest\": \"<string>\"\n },\n \"connections\": [\n {\n \"connection_id\": \"<string>\",\n \"expected_version\": 1\n }\n ]\n}"
response = http.request(request)
puts response.read_body{
"tool_source": {
"id": "<string>",
"workspace_id": "<string>",
"name": "<string>",
"provider": "<string>",
"description": "<string>",
"source": {
"kind": "mcp",
"url": "<string>",
"authenticated": true
},
"status": "pending",
"default_enabled": true,
"default_permission": "always_ask",
"tool_count": 1,
"last_sync_at": "<string>",
"last_sync_error_code": "<string>",
"version": 1,
"created_at": "<string>",
"updated_at": "<string>"
},
"provider_package": {
"name": "<string>",
"version": 1,
"digest": "<string>",
"review": "curated"
},
"connection_count": 5000
}{
"error": {
"type": "validation.malformed",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-malformed"
}
}{
"error": {
"type": "auth.invalid_key",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#auth-invalid-key"
}
}{
"error": {
"type": "auth.disabled_tenancy",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#auth-disabled-tenancy"
}
}{
"error": {
"type": "validation.not_found",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-not-found"
}
}{
"error": {
"type": "validation.conflict",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-conflict"
}
}{
"error": {
"type": "budget.exceeded",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#budget-exceeded"
}
}{
"error": {
"type": "runtime.internal",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#runtime-internal"
}
}Adopt a reviewed A2A source revision
Adopt one A2A ToolSource revision only when its complete ordered ES256 keyset and card URL exactly match the host’s current configured ProviderPackage. The required Idempotency-Key and request compare-and-swap the ToolSource and name the exact version of every non-revoked dependent Connection; each dependent package binding must advance monotonically, declare its predecessor compatible, preserve or raise its visible review tier, and continue to contain that Connection’s scopes, Principal-qualified custody binding, and egress. Discovery verifies the candidate card before publication, existing Tool enablement remains stable by name, and an exact retry resumes any already-migrated Connection without trusting a card-named key.
Checkfu support posture: alpha; hosted. Required evidence journey: capability-catalog. Deployment-specific readiness and the latest proven release are available from GET /v1/support/capabilities.
POST
/
v1
/
tool-sources
/
{id}
/
source-revisions
Adopt a reviewed A2A source revision
curl --request POST \
--url https://api.checkfu.com/v1/tool-sources/{id}/source-revisions \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--header 'checkfu-version: <checkfu-version>' \
--header 'idempotency-key: <idempotency-key>' \
--data '
{
"expected_version": 1,
"source": {
"kind": "a2a",
"card_url": "<string>",
"verification_keys": [
{
"kty": "EC",
"crv": "P-256",
"x": "<string>",
"y": "<string>",
"kid": "<string>",
"alg": "ES256"
}
]
},
"provider_package": {
"name": "<string>",
"version": 1,
"digest": "<string>"
},
"connections": [
{
"connection_id": "<string>",
"expected_version": 1
}
]
}
'import requests
url = "https://api.checkfu.com/v1/tool-sources/{id}/source-revisions"
payload = {
"expected_version": 1,
"source": {
"kind": "a2a",
"card_url": "<string>",
"verification_keys": [
{
"kty": "EC",
"crv": "P-256",
"x": "<string>",
"y": "<string>",
"kid": "<string>",
"alg": "ES256"
}
]
},
"provider_package": {
"name": "<string>",
"version": 1,
"digest": "<string>"
},
"connections": [
{
"connection_id": "<string>",
"expected_version": 1
}
]
}
headers = {
"checkfu-version": "<checkfu-version>",
"idempotency-key": "<idempotency-key>",
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {
'checkfu-version': '<checkfu-version>',
'idempotency-key': '<idempotency-key>',
Authorization: 'Bearer <token>',
'Content-Type': 'application/json'
},
body: JSON.stringify({
expected_version: 1,
source: {
kind: 'a2a',
card_url: '<string>',
verification_keys: [
{
kty: 'EC',
crv: 'P-256',
x: '<string>',
y: '<string>',
kid: '<string>',
alg: 'ES256'
}
]
},
provider_package: {name: '<string>', version: 1, digest: '<string>'},
connections: [{connection_id: '<string>', expected_version: 1}]
})
};
fetch('https://api.checkfu.com/v1/tool-sources/{id}/source-revisions', 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.checkfu.com/v1/tool-sources/{id}/source-revisions",
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([
'expected_version' => 1,
'source' => [
'kind' => 'a2a',
'card_url' => '<string>',
'verification_keys' => [
[
'kty' => 'EC',
'crv' => 'P-256',
'x' => '<string>',
'y' => '<string>',
'kid' => '<string>',
'alg' => 'ES256'
]
]
],
'provider_package' => [
'name' => '<string>',
'version' => 1,
'digest' => '<string>'
],
'connections' => [
[
'connection_id' => '<string>',
'expected_version' => 1
]
]
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json",
"checkfu-version: <checkfu-version>",
"idempotency-key: <idempotency-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.checkfu.com/v1/tool-sources/{id}/source-revisions"
payload := strings.NewReader("{\n \"expected_version\": 1,\n \"source\": {\n \"kind\": \"a2a\",\n \"card_url\": \"<string>\",\n \"verification_keys\": [\n {\n \"kty\": \"EC\",\n \"crv\": \"P-256\",\n \"x\": \"<string>\",\n \"y\": \"<string>\",\n \"kid\": \"<string>\",\n \"alg\": \"ES256\"\n }\n ]\n },\n \"provider_package\": {\n \"name\": \"<string>\",\n \"version\": 1,\n \"digest\": \"<string>\"\n },\n \"connections\": [\n {\n \"connection_id\": \"<string>\",\n \"expected_version\": 1\n }\n ]\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("checkfu-version", "<checkfu-version>")
req.Header.Add("idempotency-key", "<idempotency-key>")
req.Header.Add("Authorization", "Bearer <token>")
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.checkfu.com/v1/tool-sources/{id}/source-revisions")
.header("checkfu-version", "<checkfu-version>")
.header("idempotency-key", "<idempotency-key>")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"expected_version\": 1,\n \"source\": {\n \"kind\": \"a2a\",\n \"card_url\": \"<string>\",\n \"verification_keys\": [\n {\n \"kty\": \"EC\",\n \"crv\": \"P-256\",\n \"x\": \"<string>\",\n \"y\": \"<string>\",\n \"kid\": \"<string>\",\n \"alg\": \"ES256\"\n }\n ]\n },\n \"provider_package\": {\n \"name\": \"<string>\",\n \"version\": 1,\n \"digest\": \"<string>\"\n },\n \"connections\": [\n {\n \"connection_id\": \"<string>\",\n \"expected_version\": 1\n }\n ]\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://api.checkfu.com/v1/tool-sources/{id}/source-revisions")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["checkfu-version"] = '<checkfu-version>'
request["idempotency-key"] = '<idempotency-key>'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"expected_version\": 1,\n \"source\": {\n \"kind\": \"a2a\",\n \"card_url\": \"<string>\",\n \"verification_keys\": [\n {\n \"kty\": \"EC\",\n \"crv\": \"P-256\",\n \"x\": \"<string>\",\n \"y\": \"<string>\",\n \"kid\": \"<string>\",\n \"alg\": \"ES256\"\n }\n ]\n },\n \"provider_package\": {\n \"name\": \"<string>\",\n \"version\": 1,\n \"digest\": \"<string>\"\n },\n \"connections\": [\n {\n \"connection_id\": \"<string>\",\n \"expected_version\": 1\n }\n ]\n}"
response = http.request(request)
puts response.read_body{
"tool_source": {
"id": "<string>",
"workspace_id": "<string>",
"name": "<string>",
"provider": "<string>",
"description": "<string>",
"source": {
"kind": "mcp",
"url": "<string>",
"authenticated": true
},
"status": "pending",
"default_enabled": true,
"default_permission": "always_ask",
"tool_count": 1,
"last_sync_at": "<string>",
"last_sync_error_code": "<string>",
"version": 1,
"created_at": "<string>",
"updated_at": "<string>"
},
"provider_package": {
"name": "<string>",
"version": 1,
"digest": "<string>",
"review": "curated"
},
"connection_count": 5000
}{
"error": {
"type": "validation.malformed",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-malformed"
}
}{
"error": {
"type": "auth.invalid_key",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#auth-invalid-key"
}
}{
"error": {
"type": "auth.disabled_tenancy",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#auth-disabled-tenancy"
}
}{
"error": {
"type": "validation.not_found",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-not-found"
}
}{
"error": {
"type": "validation.conflict",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#validation-conflict"
}
}{
"error": {
"type": "budget.exceeded",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#budget-exceeded"
}
}{
"error": {
"type": "runtime.internal",
"message": "<string>",
"more": "https://docs.checkfu.com/reference/errors#runtime-internal"
}
}Authorizations
Bearer authentication header of the form Bearer <token>, where <token> is your auth token.
Headers
Available options:
2026-08-24 Required string length:
1 - 255Path Parameters
Pattern:
^ts_[0-9a-f]{32}$Body
application/json