Eval runs

Get an upload URL for a run artifact

Mints a short-lived URL for uploading a widget blob or other artifact referenced by an ingested run.

How eval runs executed OUTSIDE the platform (local dev, CI) reach the Evals dashboard. Authenticate like any other /api/v1 route (typically an sk_ key); the gateway swaps in a delegated org-scoped token so the backend’s fail-closed org scoping applies.

The {projectId} segment declares where results land and always wins over any projectId in the body. The literal default resolves to the key org’s Default project — the zero-config CI case.

STATUS AND BODY PASS THROUGH VERBATIM: success shapes are the legacy { ok: true, ... } envelopes the SDK reporter parses, not the v1 resource envelope.

POST

projects

{projectId}

eval-ingest

artifacts

upload-url

Get an upload URL for a run artifact

curl --request POST \
  --url https://app.mcpjam.com/api/v1/projects/{projectId}/eval-ingest/artifacts/upload-url \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{}'

import requests

url = "https://app.mcpjam.com/api/v1/projects/{projectId}/eval-ingest/artifacts/upload-url"

payload = {}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({})
};

fetch('https://app.mcpjam.com/api/v1/projects/{projectId}/eval-ingest/artifacts/upload-url', 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://app.mcpjam.com/api/v1/projects/{projectId}/eval-ingest/artifacts/upload-url",
  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([
    
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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://app.mcpjam.com/api/v1/projects/{projectId}/eval-ingest/artifacts/upload-url"

	payload := strings.NewReader("{}")

	req, _ := http.NewRequest("POST", url, payload)

	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://app.mcpjam.com/api/v1/projects/{projectId}/eval-ingest/artifacts/upload-url")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.mcpjam.com/api/v1/projects/{projectId}/eval-ingest/artifacts/upload-url")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{}"

response = http.request(request)
puts response.read_body

{}

Authorizations

Authorization

string

header

required

MCPJam API key (sk_…). Create one at Settings → API keys. Guest sessions cannot use the API, and API keys cannot manage other API keys.

Headers

x-mcpjam-eval-vocabulary

enum<string>

Which vocabulary this request and its response speak. Absent means 1, which is byte-for-byte today's contract: the same request fields, the same refusals, the same response projection. 2 is the canonical vocabulary. Any other value is a 400 with code: "VALIDATION_ERROR".

Today it decides one thing: the spelling of an evaluator's policy role. Vocabulary 1 accepts and returns gating; vocabulary 2 accepts both spellings and returns the canonical required. Sending required without the header is a 400, deliberately — vocabulary 1 is not widened to meet vocabulary 2 half way, because a boundary that accepts a spelling it does not announce is one two implementations can disagree about.

A response that varies by vocabulary sends Vary: x-mcpjam-eval-vocabulary.

Available options:

1,

2

Path Parameters

projectId

string

required

Project id, or the literal default for the key org's Default project.

Body

application/json

Forwarded VERBATIM to the backend's eval-ingestion surface, which owns the schema. The projectId path segment always wins: it overwrites any projectId in the body, and the literal default omits it so the key's org Default project is used. Bodies are capped at ~6 MiB here and 5 MiB by the backend.

Response

The backend's response, passed through.

The backend's response, passed through verbatim along with its status code. Success shapes are the legacy { ok: true, ... } envelopes the SDK reporter parses — deliberately NOT the v1 resource envelope. Errors are canonical v1 { code, message }.

⌘I

Get an upload URL for a run artifact

curl --request POST \
  --url https://app.mcpjam.com/api/v1/projects/{projectId}/eval-ingest/artifacts/upload-url \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{}'

import requests

url = "https://app.mcpjam.com/api/v1/projects/{projectId}/eval-ingest/artifacts/upload-url"

payload = {}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({})
};

fetch('https://app.mcpjam.com/api/v1/projects/{projectId}/eval-ingest/artifacts/upload-url', 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://app.mcpjam.com/api/v1/projects/{projectId}/eval-ingest/artifacts/upload-url",
  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([
    
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($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://app.mcpjam.com/api/v1/projects/{projectId}/eval-ingest/artifacts/upload-url"

	payload := strings.NewReader("{}")

	req, _ := http.NewRequest("POST", url, payload)

	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://app.mcpjam.com/api/v1/projects/{projectId}/eval-ingest/artifacts/upload-url")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://app.mcpjam.com/api/v1/projects/{projectId}/eval-ingest/artifacts/upload-url")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{}"

response = http.request(request)
puts response.read_body

{}

API Guides

Endpoints

Get an upload URL for a run artifact

Authorizations

Headers

Path Parameters

Body

Response