polls.karbach.digital
https://api.polls.karbach.digital/v1/federal/trend
● healthy
model-context-protocol-mcp
Election data for agents: Germany, Spain, France, EU. Polls, forecasts, MPs, energy. Paid via x402.
Category
model-context-protocol-mcp
Chains
base
Price
$0.0100 USDC / call
Paid verification
How it worksNo sponsored paid call yet.
Pay this endpoint once from your own wallet (Base USDC, up to $1.00) and we call it and record what came back. Your wallet pays the listed recipient directly; Agent Tools never holds funds. Sponsored checks prove delivery; they do not count as demand.
Quality grade
How grading works
A
70.5 / 100
Availability
20.0 / 20
Endpoint responded (HTTP 200)
Payability
15.0 / 15
- ✓ Answers a real HTTP 402 challenge
- ✓ Publishes a /.well-known/x402 descriptor
- ✓ Payment address on record
- ✓ Settlement network declared
- ✓ Price declared
Demand
15.2 / 35
14 distinct payers, 118 USDC transfers in the last 30 days
Performance
7.7 / 10
Last probe answered in 606 ms (full marks at 200 ms or less)
Readiness
12.6 / 15
Agent readiness 84/100
Owner verified
0.0 / 5
Nobody has claimed this listing yet
Endpoint last checked 19 h ago.
On-chain activity last read 3 d ago.
Availability and on-chain demand are both re-probed daily; the grade
updates automatically on the next pass. This grade sets search order and
leaderboards; the readiness score below is shown for reference only.
x402 readiness
B · 84/100
Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here A, 70.5/100), which weighs availability, payability and on-chain demand. How the two differ
| Valid payment requirements | 10/10 | Payment requirements carry a payee, a mainnet network and a price. |
| Live 402 challenge | 20/25 | Endpoint reachable; its 402 challenge was seen earlier (606 ms). |
| x402 version | n/a | x402 version not observed yet. |
| Signed descriptor | n/a | No x402 standard defines a signed descriptor. |
| Uptime (30 days) | 15/15 | 26/26 probes succeeded over 30 days (100%). |
| Resource declaration | 8/10 | 46 paid resources; 46 sampled lack a description. |
| Verified identity | 5/10 | Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control. |
| Freshness + modern flags | 5/5 | seen in a source within 7 days; declares x402. |
| Security declaration | n/a | Payment is the access control for an x402 resource. |
Applicable criteria total 75 points, scaled to 100.
Responsiveness: Responsive
(606 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).
Payment evidence: x402_challenge
— We sent a request and got a live HTTP 402 challenge.
Also:
x402_manifest, bazaar_feed, catalog_listing.
Qualifies the payment claim; adds no points.
Measured 2026-11-11.
Nine criteria, the same as the A2A readiness score, read from our daily probe of the paid endpoint, its payment requirements and 30-day probe history. Signed descriptor and security declaration are n/a for x402 (payment is the access control), as is an x402 version we have not observed; the remaining points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. It also feeds 15 points of the x402 quality grade.
Compared with peers
Against 10,082 reachable x402 APIs in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.
- Readiness
- Higher than 67% of peers
- This listing 84 · peer median 78
- Latency
- Faster than 13% of peers
- This listing 606 ms · peer median 205 ms
Where it loses the most points, and how to win them back
- Live 402 challenge −5
— Answer the paid path with a valid 402 challenge.
Now: Endpoint reachable; its 402 challenge was seen earlier (606 ms).
- Verified identity −5
— Claim the listing and prove control of its domain.
Now: Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
- Resource declaration −2
— Declare each paid resource with its input and output schema.
Now: 46 paid resources; 46 sampled lack a description.
Paid endpoints
46 resource(s) advertised by this origin. Each price below is that resource's own x402 price; the headline price is the range across them.
https://api.polls.karbach.digital/v1/federal/trend
https://api.polls.karbach.digital/v1/polls/latest
https://api.polls.karbach.digital/v1/track-record
https://api.polls.karbach.digital/v1/elections/sl-2027
https://api.polls.karbach.digital/v1/constituencies/299
https://api.polls.karbach.digital/v1/federal/history
https://api.polls.karbach.digital/v1/constituencies/by-postcode/66453
https://api.polls.karbach.digital/v1/constituencies/299/race
https://api.polls.karbach.digital/v1/constituencies/299/results
https://api.polls.karbach.digital/v1/members
https://api.polls.karbach.digital/v1/members/aaron-valent
https://api.polls.karbach.digital/v1/members/aaron-valent/votes
https://api.polls.karbach.digital/v1/bundestag/votes
https://api.polls.karbach.digital/v1/institutes
https://api.polls.karbach.digital/v1/briefing/today
https://api.polls.karbach.digital/v1/briefing/2026-09-20
https://api.polls.karbach.digital/v1/governments
https://api.polls.karbach.digital/v1/results/federal/turnout
https://api.polls.karbach.digital/v1/live/mv-2026
https://api.polls.karbach.digital/v1/bundestag/committees
https://api.polls.karbach.digital/v1/bundestag/speeches
https://api.polls.karbach.digital/v1/bundestag/documents
https://api.polls.karbach.digital/v1/constituencies/299/dossier
https://api.polls.karbach.digital/v1/members/aaron-valent/side-income
https://api.polls.karbach.digital/v1/bundestag/side-income
https://api.polls.karbach.digital/v1/lobbying/search
https://api.polls.karbach.digital/v1/lobbying/ranking
https://api.polls.karbach.digital/v1/lobbying/R001243
https://api.polls.karbach.digital/v1/parties/donations
https://api.polls.karbach.digital/v1/attention
https://api.polls.karbach.digital/v1/energy/germany
https://api.polls.karbach.digital/v1/energy/europe/prices
https://api.polls.karbach.digital/v1/energy/gas-storage
https://api.polls.karbach.digital/v1/energy/lng
https://api.polls.karbach.digital/v1/energy/fuel-prices
https://api.polls.karbach.digital/v1/europe/parliament
https://api.polls.karbach.digital/v1/europe/countries
https://api.polls.karbach.digital/v1/europe/countries/FR
https://api.polls.karbach.digital/v1/france/presidential-2027
https://api.polls.karbach.digital/v1/france/presidential-2027/runoff
https://api.polls.karbach.digital/v1/france/presidential-2027/polls
https://api.polls.karbach.digital/v1/spain/general-2026
https://api.polls.karbach.digital/v1/spain/general-2026/provinces
https://api.polls.karbach.digital/v1/states/SL
https://api.polls.karbach.digital/v1/europe/elections
https://api.polls.karbach.digital/v1/polls/archive
How to call
cURL · x402-fetch / x402-axios will auto-handle 402
curl -sS -i -X GET https://api.polls.karbach.digital/v1/federal/trend # expect HTTP 402 Payment Required (about 0.01 USDC/call)MCP endpoint
https://api.polls.karbach.digital/mcp/.well-known/x402.json
https://api.polls.karbach.digital/.well-known/x402
Listed in
Directories this entry was found in.
cdp-bazaar since 2026-10-18
x402scan since 2026-10-18
mcp since 2026-10-18
x402 since 2026-10-18