--- title: "Thurgauer Kantonalbank Exchange Rate API: CHF Buy and Sell Rates as JSON" description: "Thurgauer Kantonalbank's devisen (non-cash) buy / sell, up to CHF 10'000 rates for 15 currencies against the Swiss franc, read hourly from the bank's own page and served as JSON with the Swiss National Bank official rate alongside. REST, JavaScript and Python examples." canonical: https://allratestoday.com/blog/thurgauer-kantonalbank-exchange-rate-api/ source: AllRatesToday (https://allratestoday.com/) — Markdown mirror of the page above; index of all pages at https://allratestoday.com/llms.txt generated: 2026-11-15T19:05:31.902Z --- Thurgauer Kantonalbank (TKB) is the cantonal bank of Thurgau. Its Wechselkurse page lists non-cash (Devisen) buy and sell rates against the franc for 15 currencies, valid up to CHF 10’000, next to a separate bank-note list. This guide shows how to read that board as JSON: what the rates mean, how they compare with the Swiss National Bank official rate and with other banks in Switzerland, and the calls that return them. ## What the TKB board shows - **15 currencies against the Swiss franc**: AUD, CAD, DKK, EUR, GBP, HKD, HUF, JPY, NOK, NZD, SEK, SGD, THB, USD and ZAR. Every value is CHF per 1 unit of the foreign currency. - **The devisen (non-cash) buy / sell, up to CHF 10'000 pair.** Swiss banks publish two lists for each currency: Devisen, the non-cash rate for transfers, account conversions and card payments, and Noten, the cash rate for bank notes, whose spread is several times wider. Many quote SEK, NOK, DKK, JPY and other currencies per 100 units, with tiers by amount; the rates here are the Devisen pair at the smallest tier, converted to francs per 1 unit. The Swiss National Bank official rate is shown next to each row. - **USD on 15 November 2026**: TKB bought at 0.825 and sold at 0.852 CHF, a spread of 3.22%. The Swiss National Bank official rate was 0.837, so the bank's mid sat +0.18% from it. - **No timestamp on the bank's page.** TKB does not print a last-updated time, so `bank_updated_at` is `null` and `captured_at` (when AllRatesToday read the page) is the only time available. - **Every day's board is kept permanently, from 15 November 2026, the day collection started.** Read one past day with `?date=`, or a range for one currency with the `/history` endpoint (paid plans). ## Spreads across the board On the 15 November 2026 board the tightest spreads were HKD (2.82%), EUR (2.92%), GBP (3.16%) and the widest ZAR (4.00%), THB (3.40%), SGD (3.39%). Spread is (sell − buy) ÷ mid: what a round trip through the bank costs, before any fees. The API returns it on every row as `spread_pct`, so you can rank currencies or alert when a bank widens its board. ## USD at TKB and other banks in Switzerland USD on the 21 boards AllRatesToday reads in Switzerland, all captured on 15 November 2026 (the Swiss National Bank official rate was 0.837): | Bank | Buy | Sell | Spread | Mid vs official | | --- | --- | --- | --- | --- | | Zürcher Kantonalbank | 0.8291 | 0.85 | 2.49% | +0.30% | | PostFinance | 0.825 | 0.8458 | 2.49% | -0.19% | | Raiffeisen Schweiz | 0.8247 | 0.8541 | 3.50% | +0.29% | | Migros Bank | 0.824 | 0.855 | 3.69% | +0.30% | | Banque Cantonale Vaudoise | 0.8221 | 0.8571 | 4.17% | +0.31% | | St.Galler Kantonalbank | 0.8242 | 0.853 | 3.43% | +0.19% | | Berner Kantonalbank | 0.827 | 0.853 | 3.10% | +0.36% | | **Thurgauer Kantonalbank** | 0.825 | 0.852 | 3.22% | +0.18% | | Bank EKI | 0.8246 | 0.852 | 3.27% | +0.16% | | Banque Cantonale Neuchâteloise | 0.8246 | 0.854 | 3.50% | +0.28% | | Schwyzer Kantonalbank | 0.8243 | 0.8548 | 3.63% | +0.30% | | Nidwaldner Kantonalbank | 0.824 | 0.848 | 2.87% | -0.12% | | Graubündner Kantonalbank | 0.8258 | 0.8497 | 2.85% | +0.09% | | Zuger Kantonalbank | 0.8228 | 0.853 | 3.61% | +0.11% | | Bank Avera | 0.8226 | 0.8524 | 3.56% | +0.06% | | Banque Cantonale de Fribourg | 0.825 | 0.8537 | 3.41% | +0.28% | | Aargauische Kantonalbank | 0.8254 | 0.8507 | 3.02% | +0.13% | | LLB Schweiz | 0.8249 | 0.8528 | 3.32% | +0.22% | | BNP Paribas (Suisse) | 0.8226 | 0.8528 | 3.60% | +0.08% | | Bank SLM | 0.825 | 0.852 | 3.22% | +0.18% | | Ersparniskasse Rüeggisberg | 0.8296 | 0.847 | 2.07% | +0.16% | TKB had the 8th narrowest USD spread of the 21. One call to `/api/v1/bank-rates/ch` returns every board in the table at once. ## Get the board (REST) You need an API key; the [free key](https://allratestoday.com/register/) works. The full board: ``` curl "https://allratestoday.com/api/v1/bank-rates/ch/tkb" \ -H "Authorization: Bearer art_live_your_key" ``` What comes back (the 15 November 2026 board, first three rows): ``` { "bank": "tkb", "name": "Thurgauer Kantonalbank", "country": "ch", "quote_ccy": "CHF", "bank_updated_at": null, "basis": "Devisen (non-cash) buy / sell, up to CHF 10'000", "captured_at": "2026-11-15T11:15:47.890Z", "rates": [ {"ccy":"AUD","buy":0.559,"sell":0.577,"mid":0.568,"spread_pct":3.169,"official":0.57902,"vs_official_pct":-1.903}, {"ccy":"CAD","buy":0.579,"sell":0.598,"mid":0.5885,"spread_pct":3.229,"official":0.58594,"vs_official_pct":0.437}, {"ccy":"DKK","buy":0.12177,"sell":0.12576,"mid":0.123765,"spread_pct":3.224,"official":0.1242075,"vs_official_pct":-0.356}, … 12 more currencies ], "disclaimer": "…", "attribution": { … } } ``` One currency, with the row fields at the top level: ``` curl "https://allratestoday.com/api/v1/bank-rates/ch/tkb?ccy=USD" \ -H "Authorization: Bearer art_live_your_key" ``` ``` { "bank": "tkb", "name": "Thurgauer Kantonalbank", "country": "ch", "quote_ccy": "CHF", "bank_updated_at": null, "basis": "Devisen (non-cash) buy / sell, up to CHF 10'000", "captured_at": "2026-11-15T11:15:47.890Z", "ccy": "USD", "buy": 0.825, "sell": 0.852, "mid": 0.8385, "spread_pct": 3.22, "official": 0.837, "vs_official_pct": 0.179, "disclaimer": "Retail buy/sell rates as displayed on each bank’s own website at capture time, quoted as home currency per 1 unit of foreign currency. Indicative only: banks change these through the day, apply them at the counter or in-app, and they are not official or reference rates. For the rate a regulation names, use the central-bank endpoints.", "attribution": { "source": "Board rates published by Thurgauer Kantonalbank on its own website, collected by AllRatesToday", "bank_url": "https://www.tkb.ch/private/services/boersen-und-maerkte/wechselkurse-waehrungsrechner", "url": "https://allratestoday.com/bank-exchange-rate-api/ch/tkb/", "terms": "Public pages that show the rates need a visible link to allratestoday.com" } } ``` The board as it stood on a past day: ``` curl "https://allratestoday.com/api/v1/bank-rates/ch/tkb?date=2026-11-15" \ -H "Authorization: Bearer art_live_your_key" ``` One currency over a date range, one row per day (paid plans; add `&format=csv`, `xml` or `xlsx` for a file): ``` curl "https://allratestoday.com/api/v1/bank-rates/ch/tkb/history?ccy=USD&from=2026-11-15&to=2026-11-15" \ -H "Authorization: Bearer art_live_your_key" ``` ## JavaScript ``` npm install @allratestoday/sdk ``` ``` import { AllRatesToday } from '@allratestoday/sdk'; const client = new AllRatesToday({ apiKey: 'art_live_your_key' }); // Thurgauer Kantonalbank's USD row const r = await client.bankRates('ch', { bank: 'tkb', ccy: 'USD' }); console.log(`TKB buys USD at ${r.buy}, sells at ${r.sell} CHF`); // The board as it stood on a past day const past = await client.bankRates('ch', { bank: 'tkb', date: '2026-11-15' }); console.log(past.snapshot_date, past.rates.length); ``` ## Python ``` import requests r = requests.get( "https://allratestoday.com/api/v1/bank-rates/ch/tkb", headers={"Authorization": "Bearer art_live_your_key"}, timeout=10, ) r.raise_for_status() for row in r.json()["rates"]: print(row["ccy"], row["buy"], row["sell"], row["spread_pct"]) ``` ## Board rate or official rate? The Swiss National Bank rate is the one tax, accounting and customs rules in Switzerland name; nobody transacts at it. TKB's board is the price a customer actually gets. The API puts both on every row: `official` is the central bank's rate for the same currency and `vs_official_pct` is how far the bank's mid sits from it. Use the board to show customers a real price, compare banks for a remittance, or keep a dated record of what the bank quoted; use the [Swiss National Bank endpoint](https://allratestoday.com/central-bank-rates-api/snb/) when a rule asks for the official rate. ## FAQ ### Where do the Thurgauer Kantonalbank rates come from? From the bank's own public rates page (https://www.tkb.ch/private/services/boersen-und-maerkte/wechselkurse-waehrungsrechner), read hourly. AllRatesToday does not change the numbers: each row is the buy and sell price TKB shows, with the mid, the spread and the Swiss National Bank rate added. ### Are these the official CHF exchange rates? No. They are TKB's retail prices for customers. The official rate in Switzerland is the Swiss National Bank rate, which the API returns as `official` on each row where the central bank has one, and in full from the central-bank endpoint. ### How often is the TKB board updated? AllRatesToday reads the page every hour. The bank prints no timestamp, so `captured_at` tells you when the rates were read. ### Can I get TKB rates for a past date? Yes, from 15 November 2026 onward; every day's board is kept permanently. Add `?date=YYYY-MM-DD` for one day: the response is the board captured that day, or the nearest earlier day within five days, with `date_requested` and `snapshot_date` added. For a range, `/history?ccy=USD&from=…&to=…` returns one row per day as JSON, CSV, XML or XLSX on paid plans. ### Do I need an API key? Yes. Commercial bank boards need an API key; any plan works, the free key included, and each call counts against the plan. Public pages or widgets that show the rates need a visible link to allratestoday.com. ## Thurgauer Kantonalbank rates, as JSON Free API key, hourly board captures, the official rate alongside. [Get your free API key](https://allratestoday.com/register/) ## Related - [Thurgauer Kantonalbank live board rates](https://allratestoday.com/bank-exchange-rate-api/ch/tkb/) - [All banks in Switzerland side by side](https://allratestoday.com/bank-exchange-rate-api/ch/) - [Swiss National Bank official rates API](https://allratestoday.com/central-bank-rates-api/snb/) - [Zürcher Kantonalbank exchange rate API guide](https://allratestoday.com/blog/zurcher-kantonalbank-exchange-rate-api/) - [PostFinance exchange rate API guide](https://allratestoday.com/blog/postfinance-exchange-rate-api/) - [Raiffeisen Schweiz exchange rate API guide](https://allratestoday.com/blog/raiffeisen-schweiz-exchange-rate-api/) - [Migros Bank exchange rate API guide](https://allratestoday.com/blog/migros-bank-exchange-rate-api/) - [Banque Cantonale Vaudoise exchange rate API guide](https://allratestoday.com/blog/banque-cantonale-vaudoise-exchange-rate-api/) - [St.Galler Kantonalbank exchange rate API guide](https://allratestoday.com/blog/st-galler-kantonalbank-exchange-rate-api/) - [Berner Kantonalbank exchange rate API guide](https://allratestoday.com/blog/berner-kantonalbank-exchange-rate-api/) - [Bank EKI exchange rate API guide](https://allratestoday.com/blog/bank-eki-exchange-rate-api/) - [Banque Cantonale Neuchâteloise exchange rate API guide](https://allratestoday.com/blog/banque-cantonale-neuchateloise-exchange-rate-api/) - [Schwyzer Kantonalbank exchange rate API guide](https://allratestoday.com/blog/schwyzer-kantonalbank-exchange-rate-api/) - [Nidwaldner Kantonalbank exchange rate API guide](https://allratestoday.com/blog/nidwaldner-kantonalbank-exchange-rate-api/) - [Graubündner Kantonalbank exchange rate API guide](https://allratestoday.com/blog/graubundner-kantonalbank-exchange-rate-api/) - [Every bank exchange rate API guide, by country](https://allratestoday.com/blog/bank-exchange-rate-api-guides/) - [Commercial bank rates API: every bank and country](https://allratestoday.com/bank-exchange-rate-api/)